I actually like pugging most of the time, and if I get a streak of bad games I just leave and do something else. I think the bracket is occasionally getting better, then worse, then better again, and so on; while actually staying pretty much the same.
Some good people will sadly leave, some will newly discover it, the majority will always be new to the bracket, new to twinking, new to the game, new to PVP or new to gaming at all. Most of those will run around the battlegrounds like chickens with their heads cut off. :/
Some of them will make the effort to learn about gear and how to play, most won't. But new good people will trickle in, some of the talented players stay, and I bet that some who leave do come back.
The nice thing about pugging is that among the games consisting of 700-800 hp spongecakes with a creamy filling of honor points there are the gems where I get to meet awesome people who make the game a fun experience!
You get that with premades, of course, but what you miss is the SURPRISE! While I'm going with silly candy metaphors: A premade is a bag of jelly beans, all good, but you only have eight flavours. PUGs are like Bertie Bott's Every Flavour Beans; sometimes you get awesome tastes, but most of them will be earwax.