Hi there,
sure, there are quite a few. I agree about MM, for instance, for the same reasons. Also Edguy were never really interesting to me; perhaps I just don't share their humour.
Then I listened into Impaled Nazarene last week and disliked it, too. The music was too plain and too screechy for my ears, and the lyrics... if they mean them, they belong to jail, if they don't they have the sickest humour. (And I do mean "sick" as in "disgusting and not even funny").
The list is probably longer, but these came to my mind right now.
Cheers!
Markus