Fourth, you make this confession without so much as suggesting what it is about the arguments for Christianity you found to be "misguided or patently absurd." I have a suspicion that it wasn't reason that was guiding you to such conclusions. For example, when you say "I slowly began to realize that my justifications for believing what I had been taught was true were no more valid that the countless claims made by any number of other religions, all of which I summarily rejected without qualm," it tells me you haven't really undertaken a serious study of Christian apologetics—or, if you have, you've rejected the apologist's arguments on the basis of a specious set of presuppositions which were not themselves ever subjected to rational scrutiny.
Again, my reason for not going into greater detail for the justification of my disbelief is because my original post was merely a confession, not an apologetic diatribe. Here are some of the apologetic arguments I have considered and a brief response to each.
Argument 1: Cosmological Argument - If everything that exists has a cause, why is a special exception made for God? The problem of infinite regress is unavoidable here, which is perhaps why the Kalam variant was introduced to contemporary audiences by William Lane Craig. However, if we are to accept the Kalam's premise that everything that began to exist has a cause, we still have no reason to suppose God is immune to this rule, only an assumption. Yet even if we make this assumption, we must ask ourselves why it is reasonable to believe that a god has always existed but unreasonable to make the same concession for the universe. The distinction is arbitrary. Even if a first cause is admitted, this cause does not necessarily entail personification as it could just as easily be naturally occurring. To assert a god must be the first cause would require evidence.
Argument 2: Teleological Argument (ex. Paley's Watchmaker) - Just because something has the appearance of design does not necessarily mean it was designed. The reason I can recognize that a watch I found lying on the beach was manmade is because I have prior knowledge of this fact. I know that people make watches and have observed both the design of a completed watch and the non-design of the raw materials composing it. Conversely, I don't have any experience with what proponents of this argument consider a "non-designed" world. I only have experience with natural objects that appear to have some level of complexity to them. However, complexity does not constitute design. A snowflake is much more complex than my name written on a piece of paper, yet we ascribe the cause of one to natural events and the other to design. The reason is because we understand the physics behind how a snowflake is created and know that this process occurs naturally, independent of any mind directing its motions. We must have a natural reference point in order for the recognition of design to have any meaning or else it is impossible to distinguish between the two.
Argument 3: Ontological Argument - Imagining the greatest thing possible does not prove existence. I can imagine the greatest unicorn to ever roam the Great Plains of Narnia but this does not mean it actually exists.
Argument 4: Pascal's Wager - The false dilemma here is that our only options are to worship the Christian God or not. However, there are many other gods that we would need to also worship in order to hedge our bets. In fact, we would need to believe in all gods if we were to wager correctly. This introduces the problem of insincerity, however, in that we are worshiping God/gods not out of reverence, but out of fear that something bad will happen if we don't. Those who make an earnest attempt to determine the correct God but are unable to do so would be condemned while those who never even undertook such a journey, preferring instead to simply blindly follow would be rewarded. I doubt this is the sort of reverence a just God would prefer.
Argument 5: Moral Argument - I will address this in your sixth objection.
The aforementioned claims all pertain more to belief in God than acceptance of Christianity. Specifically, I reject Christian claims because its supposed evidence is no more substantiated than that of other religious claims. Miracles performed by Jesus in the Bible have no basis for belief whatsoever in that they are merely anecdotal and in no way constitute evidence. A position of disbelief is actually the default by which any claim is subject to until the one making the claim has met their burden of proof. For example, I don't believe that there is a teapot orbiting the moon. If someone told me that there was a teapot orbiting the moon, the rational position would be to disbelieve them. I am justified in this disbelief because I have never seen a teapot orbiting the moon or have any evidence of teapots doing such things. However, if I pulled out a telescope and looked up at the moon, only to see a teapot whisking its way through space, my position would now change. The burden of proof for the claim that a teapot is orbiting the moon would have been met and my beliefs would shift accordingly.
The same is true with God. I do not believe that Allah, Zeus, or any other ancient deities actually exist. I am justified in this belief because no evidence has ever been presented to me that Allah or Zeus exist. Despite all of ancient Greece and 1.6 billion Muslims alive today telling me that these gods exist, I have no reason to believe it because their personal feelings and anecdotes are not sufficient. You probably feel the same way. You immediately recognize that although someone may be passionate about a belief to the point of certitude, this belief must still be validated with evidence. Hence, you don't believe in Allah or Zeus. You believe in the Christian God. You believe in this God, presumably, because you feel that a certain burden of proof has been met to justify this belief. You may have affirmations from friends and family that these beliefs are true, personal feelings of awe and wonderment whenever you think about this god, or apologetics that you believe all justify faith in the Christian God. Most importantly, you must have something that is different from what Muslims have that convinces you that you're right and they're wrong.
And that's when we start to look at evidence. All of the justifications of faith I just named are not evidence. Even something as supposedly scientific as Christian Apologetics only serves to postulate questions that it then attempts to answer by presupposing a Christian God. And that is why I struggle with faith. In every other aspect of my life, I apply a standard of critical thought to determine what is and what is not true. Nothing is exempt from this level of scrutiny because my understanding of reality would suffer otherwise. When I apply the same level of critical thought to Christianity as I do to every other religion, indeed every other aspect of my life, it simply doesn't measure up. I don't believe that Mohammed ascended to heaven on the back of a winged horse at the exact spot that the Temple Mount now resides. This is a perfectly rational position to take and no Christian would fault me for taking it. Yet, I have the exact same amount of evidence that Jesus rose from the dead, Moses talked to God, or any number of such miracles as I do for the claim that Mohammed ascended to heaven. Therefore, I must either apply critical thought and reject both claims or suspend it and accept both. But no one accepts both. They believe one and deny the other, attributing their decision to faith. This is problematic because it in no way allows us to arrive at an accurate understanding of our world and in many ways hinders it. Faith is simply the belief in an idea despite no corroborating evidence and, sometimes, even in the face of conflicting evidence. It is not a path to truth.