Used to be DOTA, that way I could hate the world and feel better. (No offense to SEA people, but the players there are the embodiment of cancer.)
Now it's XCOM or competitive Pokemon. I like strategy games with depth.
I adore strategy games and they're basically crack to me, especially turn-based SRPGs. Re. XCOM - great game, although I found the maps really disappointing, but the strategic layer was engaging and I wanted to try Long War, I just never got around to it.
I played competitive Pokémon for years too. Then everyone I played with moved onto LoL for basically the reasons you were playing DOTA. Server moves forced me to give up that poison - the Oceania server is probably just as bad as the SEA server.
If I had any motivation, I'd probably be playing Valkyria Chronicles 4 right now - I waited for that game with quite a lot of anticipation, and I used to know someone on the localisation team. Ah well.
In response to OP: I was playing a deckbuilder/roguelite called Slay the Spire recently - very enjoyable game, I put in about 150 hours and then went to hospital, so I just stopped to make one last attempt to function. For years my go-to comfort games were rhythm games, but I started to be able to go into trances playing them, so I quit. I also like futuristic racing games, but there aren't many super good ones for the PC.
My permanent comfort game is Animal Crossing, and it's been a coping mechanism during some really unstable stuff, but with my true addict's personality I'm incapable of playing that normally either. It has a similarish appeal to me that playing with miniatures does.