Karma was supposed to be- does the post fit the sub, if so upvote, if not downvote; but people use it as a meter to say they agree or disagree, like or don't like. It seemed to inspire hatred and anger. There's so much negativity towards others on Reddit. I'm not sure how to stop the antipathy but personally I don't want to see that here.
Also, cross posting from apps like tictok is bothersome. If I want to see this type of thing, I'll go there and watch.
I didn't like my post history being available for public access. For example, if I post in a sub for suicide bereavement, that information is meant for that one small community. I don't necessarily want others to be able to see it and know that personal information. The same could go for victim support, mental health, or other health related subs.
I also don't want to be followed. I know there's a way to turn it off but I learned that way late in the game.