I get your point and i don't dislike deathcore, i really liked All shall perish first effort when it came out, and i dig some bands like ANIMOSITY, The black Dahlia Murder, The Red Chord, ...
Then i have no problem with very simple, predictable, "no need to think too much" music, as i love bands like Madball, Pennywise, Foo Fighters, ...
I also love "fast as fuck" blast beat parts when it fits the music and i am a huge brutal death metal fan. Nothing is better than a crushing Nile/Dying Fetus song starting with a fast as fuck and brutal blast beat with an awesome tremolo riff behind.
BUT i'm totally fed up with those trillions of band copying ASP/TBDM, having the same logo, and above all nothing "exciting". Now when i hear the typical "subdrop + Low A string chugga breakdown", whereas i should feel like 'wow this shit is awesome i'm gonna jump in the pit and kill everyone", i feel more like "OMG is it a joke or what ? Is it a cover band ? This shit is boring and pisses me off". After hearing a song, i'm like "ok this is pro, but in the end i had to struggle to listen to the song until the end and not fall asleep or push the "stop" button, and i don't remember any riff/part AT ALL".
See what i mean ?