People get away with being toxic in every way
There are several ways to get away with being toxic in this game.
1: Duo with someone that way when you rage almost half the team is getting on the same person. When duo players do it it's much harder for the other people on the team not to just join in towards the end.
2: Only rage to your team if you don't do it in all chat all you have to do is throw the blame at someone else as soon as you get back in lobby. It is possible that the other team will even support you thinking that you are the victim of something.
3: If you don't care about waiting 5 minutes every time you try to join a game you can just rage quit. This one I am sure that most have already seen several times maybe multiple times a day.
4: Spam ping, it is a built in function of the game to easily communicate with you team how can that be toxic? You get a position someone else wanted expect the heavy spam ping every time they die you die or anyone else on the team dies, because it is clearly your fault.