My go-to game for about 3 years now is LoL. But i also play a lot of minecraft and some Dota 2. But I just started Dota 2 around 2 weeks ago, so I'm still getting used to it.
I've been playing less lately too, but not because it's stressful or something like that. I just hit my goal of platinum a month ago and since then I tried leveling my smurf (level 28 atm) but that gets boring pretty quickly. The key to ranked imo is to play for yourself and not care about what others say. The mute button is also pretty useful, I just mute someone as soon as I see them being negative, because I don't want my mood ruined by some stranger just because of a game. I also turned all-chat off and that helped a lot, because i don't see the flaming between the teams then.