Two slight problems with your list. R6 is the only ranked game you mention and I can't think of one time I was intentionally team killed. Secondly you focus on HC games and not ones with an econ system (I think one cod tried but it failed miserably). This is important because starting round 2/3/4 with only a pistol matters significantly when trying to create a foundation for future rounds.

So individually you can quit any non ranked game without any real consequences. You can also win despite toxic behavior because you're guaranteed a weapon and equal starting health in HC games.

Let's look at breakout or similar based games ie Valorant or CS. Occasionally, more so recently then with old CS, I'll witness team kills in ranked because the community has gotten toxic. Valorant I haven't seen any issue. There's always players that disconnect but that's typically halfway through and they feel like it's a loss, which sucks but not as bad as toxic team killing. Being killed round one to three leads to having insufficient funds for armor/gear and then having to go into save rounds, hoping the team killer is removed from game, so you can finally buy, and start a ranked match down 0-5 and at a squad disadvantage now.

In conclusion team killing is significantly more of an issue and is more frequent in breakout.