>>10847i think it's hard to associate slam with any political leaning since the whole thing seems to be just about having a very nasty and violent sound and gore lyrics. But since it attracts edgelords, I'd say it leans reactionary
as for deathcore, I don't pay a lot of attention to the lyrics, but from the lyrics I know it seems to also be very nihilistic, like deathmetal lyrics usually are. The lyrics are also sometimes about stress and anxiety and shit, and I don't know what to make of these mental health themes politically. I don't remember any deathcore song that'd openly take a politcal stance. But again, I usually don't pay attention to song lyrics and I'm an idiot, so don't take any of my assumptions seriously