Answer: Yes it is possible.
Step-by-step explanation:
There are many reasons why they could possibly hate themself. Bullying, Abuse, Comparision to other children, low self-esteem, as well as many other reasons. They're thoughts can come from people judging them for whatever they hate themself about. Seeing people's life online and wishing to have what they dont have. No positive thoughts come in until someone recognizes their abilities and qualities, but one single bad comment can change their perspective on themself. Everyone has at least one flaw and when they realize that it doesn't matter what they look, act, or even have, that they're still them and no one else can change that. They can dance to the beat of their own drum and own their life when they accept who they are instead of hating on themself.