Because he does in fact talks slow, and monotonous
None of his promos has ever compelled or engage me. No sign of emotional investment, just shitty acting throughout his promos and mannerisms.
As for Orton wrestling abilities, it has been proven many times as individuals before has listed out his limited moveset with less than stellar moves, but blind marks will avoid this fact. It's okay.
Avoiding the truth. The way of the mark.