Lots of artists have taken relatively simple "raw materials" and built complex music out of it. Take something like Slayer's South of Heaven, a true masterpiece of creative economy. There's nothing technical about it. It doesn't hit you with an ever changing riff salad. There are no unusual instruments, not even an acoustic passage. Nonetheless, the band builds songs of great interior complexity and ties the entire album together through the relatively simple device of reusing melodic fragments in variation (not unlike the classical notion of the 'motif'). That's what is missing from Bloodbath: the strategic vision to tie all those little tactical bits together into something more complex than dumb rock music that sounds like "old school" death metal.