Glen Benton is a bit of a whack who I find a bit annoying and stupid with his upside down cross craved in his forehead, his boasting about torturing animals etc. but the first two are undeniably great death metal albums.
The rest of the discography is hit an miss IMO..
I doubt its really just a put on, death metal bands like Mayhem have done far worse. After Serpents for me is when Deicide became hit or miss.