

She’s not. She’s just using that argument to not speak the truth: That it’s disgusting to not keep yourself clean and she’s ashamed of your (probably) poop stained underwear.
Teenagers truly can be disgusting. It’s hard to tell them though. Even harder is, when this applies to grown ups.
Growing up means to realise that even the hurtful thing’s people said to you, where probably just said because they care for you. (Not everyone cares obviously) Parents live their first life too.
How to handle criticism. To take the best from it, learn from it, try to become more of what is important to yourself and leave the rest.
It’s either not taking it at all, thinking everyone is wrong… or it’s giving it to much attention. Like thinking the opinion of people that you don’t respect at all, that you don’t even like counts too. You’ll never be right for everyone. But being criticised by people that care to make your life better is actually precious.