Do less popular members in a group feel resentment and envy towards the popular members?

Obviously lol? If they didn’t then they’re not human. Jealousy is a natural feeling but It all comes down to if people act on it or not. There’s a difference between feeling that envy when your friend does better than you, then lashing out and bashing them for it

Quote from chounim

i mean if you don't get any opportunities while your group mates get plenty and become more popular the resentment might be bigger, you will wonder whether things would be different if you had opportunities to show yourself and promote individually. but if you get fair treatment and still don't make it as far as someone else then you can't really call that injustice.

Yeah I agree but idols lowkey will still resent/ feel jealous and there’s nothing wrong with that

Yep, happened with Lee Hyori and Sung Yuri in Fin.K.L. Hyori became who she is today but Sung Yuri was more popular within the group.