There are plenty of questions that we as humans cannot answer regarding God. We can't speak for him and we don't know his motives. By the laws of logic, some of them are pretty baffling, I agree with you there. Now, just because he knows where we ultimately will end up, does that necessarily mean we didn't have a say in it? I don't think so. I get up in the morning, and I choose whatever I want to do. I conciously choose to sin when I do sin, even though I know its wrong. I believe we have free will and we determine where we end up, even if the Creator happens to know the choices we will make. It doesn't necessarily mean those choices were predetermined.
Regarding why we have to suffer for the sins of Adam and Eve: if you look at it, that sort of thing is still happening today. An innocent fetus is turned into a drug addict because his mother is a crack head. People die of cancer due to pollution and other things people did in the past. We all suffer from the choices of our ancestors no matter if we like it or not. Thats why sin isn't necessarily just a personal decision.
Also, its silly to say that you had to be enstilled with faith as a child in order to believe in God. Thats simply not true. Both my parents didn't believe in God, and my dad went on to pastor a church. Something about our intelect doesn't want us to believe that a God exists. Its like we conceive it as a naive thought or something. Because we can't see it physically, we choose to think it doesn't exist. In reallity theres no better explaination for why we're here outside of a creator.
My $.02
Let your soul shine. Its better than sunshine. Its better than moonshine. Damn sure better than rain.