I'd say
Damián Antón Ojeda was the patient 0 of combining emo zoomerisms with black metal with Sadness and trhä, and while I liked the non-binary freak's music initially, it didn't take long for me to realise he was an actual black metal content farm with how many albums he shits out per year that all sound exactly the same while his fans continuously eat it up. His nonstop spamming of music combined with the dime a dozen copycats/other terminally online people getting into BM and making their own "avant-garde-post-black-metal" variants has made BM in the 2020s an absolute nightmare to traverse through.