It's almost as if having one of the worst reputations of any video game ever is damaging to your long-term health...
Still, I can't really roast them. League of Legends genuinely did clean up their act when it comes to toxicity, and as hard as I tried to kick the habit, I still find myself going back and playing the occasional match of Heroes of the Storm, which is owned by a much scummier company that deserves to crash and burn.
And really, the MOBA genre isn't as dominant as it once was in general either. It's been a gradual decline, there's been no big disaster that crashes everything. Just there are other genres in style right now. All things considered, I think LoL is doing totally fine given the circumstances. Nothing to worry about, so don't be disheartened if it's a game you enjoy.