So if there's something I don't like, I should just shut up and leave it in the store?
I say that is my right to complain. Actually, I'm sure that many designers want us to tell them what we hate about their stuff. If we stop buying without saying a word, they'll sit there wondering why their sales plummet. They might thing that noone likes the game anymore and stop producing. But if a lot of people complain about how they don't like a particular thing, the designers might rething the thing, fix it in the next edition, and sales go up again.
D&D wouldn't be what it was if the fans just stopped buying.