Raised Lutheran (ELCA). Did Sunday school, went to and taught bible school, catechism, confirmation, etc. As an adult, I went to church less and less.
As someone already mentioned, there is a difference between being religious and being spiritual. I am spiritual. Part of the reason for becoming less religious was the hypocrisy, cherry picking, and weaponization of religion. Went through a long agnostic period, and still have agnostic moments. But then I see some of the truly miraculous things in the world and I find it hard to believe that there isn’t a divine hand involved.
I do still use some of my religious education as a guide for how to live my life. I try to do unto others, show hospitality to strangers, etc. I happen to have learned those lessons in Sunday school, but empathy and compassion are not exclusive to Christianity.
That’s what saddens me about some Christians and some religions. There is too much time spent trying to prove who’s right and who’s wrong, and especially trying to dictate how others are supposed to live their lives according to the religious principles you happen to adhere to. We seem to suffer from a lack of charity, Christian or otherwise.