May Allah bless you for thinking for yourself and taking the time to compare Qur'an with material based on hearsay!! I guess one has to go through a period of darkness to appreciate illumination. Many of us, on this forum, were in the same boat. We were not satisfied with what was being preached as "The other part of Revelation"
We don't claim to have all the answers (if we did, we would have been fundamentalists) as research and careful study of Allah's Message is an ongoing process.
We have also learnt here to differ with grace (most of the time!) and do not throw around stink bombs of "Kaafir, Murtad, Deviant, Zindiq" etc.
Welcome to the forum!!