It's hard to describe LoL, it's a game that can be fun, if you do two things:
1. You can move past the toxic teammates, sometimes when I just want to have fun and play characters or try new things out, I mute all, even before any trash talk. I might not even be receiving trash talk because it's not like every game I will meet someone whos toxic, but it's just for the fact I want to make sure I enjoy myself.
2. You learn the game. League is by far the hardest game to get into because the skill is based on knowledge, what to do, who are the characters and what they do, and how to react to specific scenarios. I still don't fully know league, and I've been playing on and off for two years now.
League has it's issues but Riot Games does constantly update it, for better or for worse the community is very much alive.
I think one can enjoy it if give time. and please, just report and mute all, lets not spread hatred.