Had this debate a few times with some friends. If it wasn't a good game, particularly for your opponents, is it still being a good sport to say "gg", which is, as we know, typing slang for "good game"? Particularly in the case of stomps and cases where a team had a leaver/idler and lost presumably because of that. I personally feel like I'm rubbing my victory in if I say gg when I'm on a stomping team. If it wasn't really a "good game", so much as a "I did well and you lost", it seems more arrogant or habitual than sportsmanlike. When a game went back and forth and didn't have one team dominating the entire time, or if a team makes an excellent comeback, or other such impressive feats, it feels like a good game. If one team was much better than the other, kudos to them, but that doesn't make it a good game.