Why would they be surprised? They'll have evolved from some previously unremarkable animal, and presumably have also caused habitat damage.
It's possible we're an extraordinary species somehow, but it's rather more likely we're unremarkable, and the aliens will just think we have particularly bad taste in television.
It's possible we're an extraordinary species somehow, but it's rather more likely we're unremarkable, and the aliens will just think we have particularly bad taste in television.