I don't play this game online, but it doesn't surprise me that people quit. After all, a lot of people quit all online games when they are losing. If you think about it, quitting is really doing is speeding up the loss for the quitter. I don't blame them, really... BLAH BLAH BLAH
Read the thread again. Play a few games online. Then comment. If you don't play online you won't understand what we're talking about.
The problems are
a) Sore losers are quitting early from team games, ruining the game for their teammates, when there's every chance they could come back and win. 5 players have their game ruined because 1 sore loser is in a strop.

Sore losers are pressing Quit when they should press Surrender. They always will because their egos won't allow them to have acknowledge a loss on their account. It shouldn't be possible to get a free quit without consent and it can be prevented by requiring other players to agree to let them off. Otherwise they can still Surrender properly
That anyone is stupid enough to think 'there shouldn't be a quit button' simply astounds me. Absolutely - lock people in a room and FORCE THEM TO PLAY UNTIL THE END! ...BLAH BLAH BLAH
Read the thread again. Realise how stupid you have made yourself look.
People who leave when they start to lose shouldn't bother you. They obviously don't care about having fun playing they game, they just want to win. And in leaving early they are ensuring they will lose and eventually will stop playing the game... BLAH BLAH BLAH
How can it not bother you if they were your teammate, and you are now playing 1v2?
If it's a 1v1 they should click the "Surrender" button.