I don't get the hate, I think he's a great fighter and a cool & respectful person. he's probably the second best HW after Cain. He handily beat Barnett & Mir & also smoked Bigfoot. I don't think he's overrated at all.
The Mir fight was boring sure but I've seen alot worse. For a wallNstall fight it was pretty eventful & DC did alot of damage against the cage. I think he just respected Mirs skills & was playing it safe. It was too bad as I think he could have outstruck him and even Ko'd him if he wanted to but oh well DC is great imo.