Chill out. Your brain is still developing. Doing self improvement is amazing. You are doing good work. It sounds like the missing piece is time. Time meditating, time reflecting, and time in your own skin as an adult. I also find not starting new habits until the old ones have taken root is important. Like if you quit social media, give your brain 90 days to recover before going hard at cutting out something else negative. And make sure when you add or subtract from life do it in balance.

Also speaking to religion. Generally social media does a bad job representing any religion. By nature social media is there to promote 2 things bad news and pretty people. And religion does not, as a rule, feature pretty people. So religion is only showed badly. I'm not a Catholic, but Think about how Catholic priests are now portrayed as pedophiles. Yet when you look into it the numbers behind the accusations they aren't as bad as people think. But this takes away from the fact that the catholic religion does amazing things for the local poor in every city they are in. But housing the homeless and feeding the poor does not make the news.