I'm a shitty person

I'm unmotivated, rude and selfish. I'm 19 and can't do something as simple as doing the dishes for my mum when she's busy working night shifts. I struggle to get up and do anything good in my life or help others around me when they're struggling. I don't think I have any worth as a person or life. Maybe this is self-pity, I don't know. I'm just over being me and hurting those around me. I want to change but I'm just so unmotivated for everything.