Agree with them. Not yes everything you say is right, way.
Agree by saying things like;
I can see why you feel/think/see it, that way.
You have a valid point.
Yep, that part of what you said is right.
Yes, that's one way to look at it.
You're saying they have a voice, validating that their opinion counts And normalising their feelings. It works try it, but don't say it in a patronising say it normally. Roll eyes internally.
Do this as well when they moan.
I look shit in this dress.
I hate doing homework.
I'm so bored/ tired/ passed off.
Reply by acknowledging instead of trying to fix.
I know how you feel, sometimes I feel horrid in whatever I put on.
Oh gosh I can remember hating the slog of homework. It's awful.
You're validating their feelings and normalising them that's all they want.
If you fix eg. No you don't, you look lovely in the dress. Will antagonise and they get cross which ends in a row.
Try the tips . It works or smooths the edges.