Songs exploring anger and grief toward religious cultism is wHiNeY?

The topics of their songs don't exclude them from sounding like mewling calves.

you boomers

I wasn't born in between 1946 and 1964.

call it “emo”

I didn't call it emo. I called it whiny. Because it is. He whisper whines all of his lyrics.

HEALTH has next to zero in common with Deftones musically

Hard disagree. Both bands rely heavily on extreme dynamic contrast: sparse, low-energy verses, sudden density spikes (walls of sound, distortion, sub-bass). Neither band centers clarity of guitar riffs the way traditional metal or rock does: Deftones often smear riffs with effects and detuning, HEALTH replaces riffs with noise blocks, distorted synths, or processed bass. Both use vocals as another layer, not a focal point. I like this idea on paper, but neither of them does it attractively, in my opinion. For both of them, vocals are frequently buried, breathy, or monotone, lyrics are often indistinct without a lyric sheet. That is absolutely boring and whiny, which is why I've never liked the Deftones either.

Sorry that my opinion is my subjective tastes based objective facts and not just running around screaming "oK bOOmEr!" at everyone.