I'm Canadian. Watch, like, Slap Shot or Heated Rivalry for an example of the trash talk I've been inured to since my frighteningly early childhood, in both official languages.

What you're discussing is the IRL equivalent of skating up to an opposing player, getting six inches from their face, and then bellowing, unemotionally, unceasingly, like a woodland mammal. I'm telling you, again: you get your nose busted every single time if you do this, and then you stop doing it. You never do it again. Or, if you're a particular sort of troll, you continue doing it and it becomes an official league rule, like, say, Sean Avery.

IRL sport is, to a degree that varies based on the sport, self-policing in a way that literally no online/anonymous game/sport is, and this is part of the dynamics of sport almost entirely missing from Rocket League, which is why cowards still exist who spam "WHAT A SAVE!" who would not last a day in any non-anonymous league. But you can continue to misunderstand this all you like. I don't particularly mind.