The problem I have with the first song (and alot of gutteral metal in general) is thus:
1) The drums are fast for sure, but it's just a blast beat from beginning to end. No real technical ability, nor groove. Get a double bass, learn to play it fast. The end.
2) The guitar is playing simple bar chords in drop tuning using a basic minor scale with alternate picking. Meh
3) It takes some amount of control to swap between gutteral screams and fry screams sure, however if you can't pick out a word besides "GROOAOOAR" then wtf is the point?
Granted when I was a kid I appreciated this kind of metal more before learning anything about music, and there are some death metal bands out there who genuinely have musical talent and put it into their music. The guys above aren't it.