No she shouldn't if she was never happy with her looks dont tell other people how they shouldfeel because living with a ugly face and hatred and being depressed wont make you happy if plastic surgery made her happy then she knows what she did was right
So you'd rather her be upset and hate herself? She seems happier post surgery, and I think that's all that matters. Not everyone can just love themselves and the way they look. If people find a problem that they can and want to fix, they are able to and should if that finds them joy.
It's hard to be happy with yourself when people constantly shit on something you can't control. You might be strong enough to handle it but some ppl like Mirae aren't able to do that. She tried to kill herself once for God's sake
She should just be happy for who she is instead of having a plastic surgery,, just my opinion