Of course, there are some good found-footage movies. I like Cloverfield, The Blair Witch Project, Paranormal Activity (the first one, not the 200th sequel), A Record of Sweet Murder, As Above So Below, etc. But a lot of them are a bit lacking (I guess that's normal for every type of film though). It's just that many found-footage films can get away with subpar picture quality, shaky cam, not much happening for most of the movie except the ending, etc. It also bugs me how they're always trying to justify or explain why they keep recording (you really don't need to explain this).
But again there are plenty of amazing examples too though like The Last Exorcism and I do love how real the best ones feel. I doubt I would ever make a found-footage movie myself but to each their own.