I wouldn't call Daemons 'stupid'.
They have been radically changed (possibly the most radical codex change ever), but they are incredibly fun to play, and they now are so much more in line with the daemons fluff. They play more like a horde army now. Yes, you will be re-rolling for random effects frequently but this makes it very amusing and very entertaining. This is why people like playing against Daemons.
Contrary to what some people believe they are not a crap army now because of the random hilarity, they are actually fairly well balanced, which may come as a surprise when you read the codex...For me, this is a testament to how well the codex was written. You will probably never get bored of them.
They definitely aren't for everyone though. You should definitely try Daemons before commiting to them.