To add onto this, skilled players tend to recognize that the mental / emotional game has a direct impact on their performance, and may actually try to de-escalate their team when they go on tilt
In some events, talking trash to the other team can be a technique to put them off balance. Although it's getting rarer to find a game that allows you to talk to the other team during a match, and personally I find it unsporting.
I never understood why people blow up at their teammates. If winning is so important to them, they should try harder to work together with their team. Anecdotally, it's always the first person to complain about a teammate that's the biggest contributor to their team's failure.
The only time it's acceptable to be abusive to a teammate is to shut down their toxic behaviour. At that point you've probably already lost, so I'll do my best to make sure they feel bad for being a bully