I don't mind covers that have nothing directly to do with the story contents.
EC, during the Atom / late Golden Age, published many comics with covers that weren't explicitly connected to the contents, such as Weird Fantasy, with quite generic-looking spaceships and alien landscapes...
I like many of the Artgerm covers, and the shift towards the opposite end of the spectrum to Al Feldstein's cover above, to realism, doesn't bother me. Much better than more of Greg Land or Greg Horn's obviously-swiped efforts from a decade or so ago, anyway.
Adam Hughes is an extremely-talented cover artist whose work sometimes relates to the story inside, but sometimes has a quite unrelated, generic quality. A degree of realism to his style, but somewhere in between the polar opposites of Feldstein and Artgerm.