People that play Diablo 3 for 30, 40 or 100 hours and then go on the internet complaining about how dull the game is just amaze me. Not saying that's you, but I've seen folks talk about sinking 100 hours into D3 and then shitting all over it.
Why does that surprise you? I don't think you can critique Diablo 3 with any sort of credibility until you at least hit Inferno. At least for me, it is not uncommon to finish a game you are not enjoying to wait and see if there is an upside, especially if you have been anticipating the game for awhile.
I disagree. I didn't need 30-100 hours of chewing on a crap sandwich to know I don't like crap sandwiches. That said, I see no reason to jump on people that invest a 100+ hours and still wish to complain. Some people may be more optimistic about the game's future or may not have anything else to play. Who knows what their motives are, but they are entitled to the opinions either way.