I've been playing csgo for 5 years with about 7000+ hours. I can tell you csgo is very toxic, especially once you get to the above average ranking. People will complain about anything you do whether it is right or wrong. The csgo community in specific is toxic. Playing games like CS:S is much less toxic, older people typically play that game so it is much more mature. In general I think that the younger the average age is for a community the more toxic it is. Another example is ARK Survival Evolved. ARK is very peaceful and I have only ran into few toxic players. Like css the majority of them are older so it is quite nice to have a normal conversation with a level headed person. I've never played League to a point where I could properly judge the toxicity of it.