I agree. Its become fashionable to slag off the show.
2 years ago Susan Boyle was also slagged off though by some people. (I read various posts about it, and from a wide range of forums, not this one, although I could probably find posts slagging Susan Boyle off on this forum, I just can't be bothered searching back 2 years.)
Bet some of those people are now saying stuff like: "oh its not as good as when Susan Boyle was on the show, she was brilliant," etc, forgetting what they had put when she was orignally on the show!
At the end of the day, everyone is entitled to an opinion, but sometimes its easy to type in a forum: "hes rubbish," "hes not very good," "shes awful" "why have the judges put her out, she was brilliant, OMG judges r stupid MEGA LOL."
But they don't really prove anything. ITV will stick with BGT for a while yet, because it does well in the ratings, and they probably make a lot of money from it.