The Biblical story of Adam and Eve doesn't imply that we are all guilty of original sin, it implies that we can be held accountable due to knowledge of good and evil

My theory is that they weren't actually punished for eating the fruit, but rather their imperfect nature became sin as a result of acquiring the knowledge from eating the fruit. They partook of God-level knowledge without being able to live up to Godhood.

Adam and Eve being punished for eating the fruit of the knowledge of good and evil is wrong, they did not know disobeying God is evil. They sinned without even knowing they were sinning or what sin even is.

I think that the knowledge of good and evil is what allows our actions to count as "sin". Animals can do things that would be called sinful if a human did them, but they don't count as sins. Adam and Eve weren't perfectly good in the garden, yet they weren't considered sinful until they actually gained the ability to know right from wrong but still did wrong.

If you think about it, the first thing they did after learning the difference between good and evil was an act of modesty, they didn't immediately start raping animals or something. The idea that we are inclined to evil because of knowledge of good and evil doesn't seem to be the true implication, mankind didn't become any more evil but rather became accountable for evil.

That being said I believe in very strict predestination and absolutely 0 free will, so I don't think we cause ourselves to do wrong. That doesn't mean we aren't credit worthy or blame worthy though. Even if Hitler didn't "choose" to do the holocaust Hitler still sucks for doing the holocaust. Hitler deserves to burn in hell because of who he is, even if he didn't choose to be who he is.

Stop blaming me for everything I do.

Are you defining "held accountable" in the moral desert (genuine blame/credit) sense, or a sense that is compatible with the view that no one is genuinely creditworthy or blameworthy?

I ask because I think you could be thinking of it in a purely consequentialist sense, like we can hold a robot accountable insofar as we can recognize the danger it poses and the extent to which we can take action to prevent it from causing something bad in the future.