Welcome brother to the original Christian denomination. The non-denominational. I was born and raised catholic. When I was around 21 years old I really began to question the Catechism because it did not line up with scripture. In fact, it down right contradicted scripture. So I left the Catholic church to find a new home. However almost every mainstream denomination has some sort of doctrine which basically states "if you are to call yourself a baptist, lutherian, pentecostal, methodist, ect, you have to believe this". The only problem is that where was always something I did not agree with. Basically it boiled down to this. I absolutely refuse to believe something solely because I was told to believe it. If it does not line up with scripture, I don't believe it.
I also think mainstream denominations probably have done more damage to the church by dividing the church and bickering amongst themselves on "who are the better christians". There is a reason why non-denominational is the fastest growing christian "denomination" in the world right now. It is because people are fed up with the division.
I used to go to atheist forums to work on my apologetics. I remember what one atheist said that really rung true. He said, "How is it that there are more atheist in America than ever before and is still rapidly rising yet you never see an atheist doing door to door with pamphlets?". The answer is sadly this, it is because they don't have to, the church does a better job converting people to atheism that any atheist could.
Ok. I am done venting. Just remember. You are in the same denomination that Matthew, Mark, Luke, John, Paul, James, and Peter were members of.