The Thread Where You Talk About Music You Like

If you're committed you can search through a list of the metal albums of 2015: https://rateyourmusic.com/charts/top/album/2015/g:metal/ If you know it would be tagged as "deathcore" or something you can change the descriptor to that: https://rateyourmusic.com/charts/top/album/2015/g:deathcore/ It's not that many albums when you narrow it down like that.
Never was more comitted lmao. Looked through the whole list... must have been wrong about the year of release. Gonna check another couple lists. Maybe it was nothing but a fever dream. I just can´t understand how I can´t find it.
 
doesn't exactly match your description, but the closest i could find:
ab67616d0000b27345397c482624b374a0ab5303
 
Also try Discogs as it can show you 250 per page, which puts the whole 2010s into only 19 pages. Only thing is it stops loading the images if you've downloaded too many so you have to give it a break for a minute.

https://www.discogs.com/search/?limit=250&type=release&style_exact=Deathcore&decade=2010

The music illuminati had the foresight to make sure not too many album covers are red, so it should be one of the easier ones to find in theory!