They're not bad, they're not being trained properly.
Sihyeon in Boca, there is some strain with that song
Many of Enhypen have weaker vocals but their songs aren't that crazy so I hope their vocals aren't getting too damaged.
ie: this encore you can see they are struggling
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Stayc, some of them have weak occasional support but not much
Some of TXT are pushing with certain notes that should be easy for them to hit
I'll add more with some more examples, again they're just being pushed to the limit if it makes sense.
There are all groups I like btw
Edit: Jongho is a good vocalist BUT I wish the Ateez songs stopped forcing him to go to the bajillionth octave every time. Maybe one song where he can take a break because I'm worried