I don't like magician Criss Angel... I dislike him in the same way I dislike Lance Armstrong and other cheaters. I think Criss Angel damages magic as an art. He has created tricks which rely on stooges and camera tricks. He "cheats", crossing many lines other magicians do not. He does it for the same reason all cheaters do it, to get more money, more fame. And the public's expectation shift as they see more and more cheating in magic, and it creates an environment in which magic suffers. Magic stops being about, "How do I operate within these generally recognized, user observable rules (where an audience member could be there in person instead of behind a TV screen) and still create mystery and wonder?" Criss Angel might as well teleport himself onto the ISS (space station) in a televised trick, his methods make that just as possible and easy as other tricks he has done on TV; but of course he doesn't do that as a trick because then people would instantly recognize the nonsense of many of his tricks. He does, of course, do quite a bit of stuff without camera edits and stooges (his Las Vegas stage magic, presumably), so I'm not suggesting he's not a capable magician, just why I find him and his origin story so flawed.
I should say that I'm not a magician, and I wouldn't even consider myself a huge fan of magic (though I enjoy it), but I recognize its art and ingenuity and don't like seeing it spoiled. And this isn't one of those live and let live issues, where people can simply vote with their entertainment dollars and let the marketplace decide. Whether I see his show or not, he does his damage, which is why I think there is value in people loudly disliking him.