|"Rage Quit" by Corrupted-Mooch|
I have noticed some people rage quit when the other team is doing things that piss them off like glitching but sometimes people do it just because they're losing. When I rage quit it's usually because the other team is glitching too much, being dicks or because my team is doing things like team killing or running off on their own generally doing things that screw the team over. If I rage quit because of the other team they definitely know it I either tell them or send them messages.
I think that people should stay more in games that they're losing. You can learn from the opposite team just by watching someone that's better than you taking note of their stratagies & things they do differently. I have learned many things just by observing teams that are much better than me. And in those cases I don't consider it losing if I'm the one improving myself!