The LoL community is more of a "I learned this by myself earlier on, so you should too now, instead of my helping you" - problem is, there aren't a lot of resources that help you learn this properly except doing it yourself, and if you don't do it and start playing ranked and do terrible, you bring the team down, which almost entices this type of toxicity.
CS:GO is also toxic, but in more of a "let's have fun type of way" - for example, I was on voice in CSGO one day and this girl goes about asking if people have perky tits, it wasn't toxic or anything, but it then enticed a bunch of men to be really perverted and brought the gameplay down a lot, in my opinion, it was mostly just an annoying atmosphere to be around.