The quitting is nto the problem, it is the symptome.
There is a number of reasons to quit a WZ. Some better than other.
As it is today we get a huge bonus for winning. If you are only playing to win the 3 wins a day to get the quest done.
As there is no punishemnt for quitting, there is hardly any reason to stay in a losing game.
Second, we play pugs vs premade. So the chance of loosing for pugs is huge.
Farming. One team go to 5-0 and then don't finish the game but keep on playing for 10 more minutes.
This is often the result of premades.
Don't missunderstand me, I love premades. But they are made to fight each other. Premade vs pugs is just wrong. The game is supposed to be fun for all parts, not only for one side.
Facing a premade group and ending losing 2-0, it is clearly time to leave the game. I will leave again and again