You’re not useless if you think like that then imagine the time when your mom kept you 9 months in her womb tolerating sickness and suffering to give you birth. Then your parents struggle their whole life to raise you in the best way. If you are useless they would have aborted you. When someone is giving you negative comments it’s their fear and insecurities, not yours don’t take everything personally. You are worth more than you can imagine.