I've always wondered whether people who hate TTG also hate Brave and the Bold. It seems like a similar transition in tone and style, but I never see people complain about Brave and the Bold on GAF.
I like TTG myself, I thought Teen Titans was getting dull in the later seasons and it needed a change. I sometimes wonder whether TTG was meant to last a couple of seasons before they went back to the serious version but it ended up being more popular so they stuck with it.
That's because they're nothing alike.