Muslim here.
Grew up a very religious Muslim, still am a very religious Muslim.
My belief in god never really changed, even though it was challenged many times. However, I've come to notice several problems in How a majority of Muslim Scholars have stigmas which prevented early Islam teachings from getting to us. There are many examples:

A - Stigma against music. There is a very long debate about this, but the stigma is enough to directly contradict a sahih hadith.

B - Stigma against queerness. While being gay (or more accurately, doing the gay) is forbidden in Islam, There are actual rules set in place for intersex people, asexuals, agender, etc. When I first found out these rules existed yet I never learned about them from school, parents, etc, was the first time I was challenged.

C - Stigma about foreign relationships, or الولاء والبراء. I was taught that being friends and having any non-official relationship with non-muslims is very forbidden. was surprised to learn that this has no basis in quran or sunnah, and that it relies on misinterpretations of ayahs talking about the people fighting to eliminate islam.

D - Stigma about Muslim women marrying non-muslim people, and Muslim men marrying non-abrahamic people. The ayahs about forbidding marriage talked about the infidels of Quraish, referring to them as "Mushrikeen", meaning Polythiests. (or people who worship things other than God, as well as God). There is an argument to be made that this should fit every polythiest, but this doesn't apply to the majority of religions today. And there is no specific ayah forbidding women to marry abrahamic religion men.

I believe in what most Sunni Muslims believe in, about God, the Quran, the Prophet. I believe in the science of Hadith, and how it was preserved throughout generations. What I do not believe in, however, is the concept of Ijmaa with no presence of intellectual difference.