How do you manage to keep a level head when your parents are trying to tell you you're not worth a thing?

Hey. So about that. My parents (actually my dad) tells me this sometimes when he gets quite angry at me. I usually manage to keep a level head except when I just can't so I just cry uncontrollably. When I can keep a level head I either ignore it if it's not too bad or I think about what he said and think if I am really useless. Sometimes he might give me a yard job and I give it a half-baked job I think okay yeah I guess I was kind of useless. Sometimes he just says it and I think okay, he's being dumb because I actually did something that he just doesn't get. So I tell myself that i'm not useless and give myself a list of reasons why i'm not worth anything. Ex. You play 10 instruments, I study things like psych, 6 languages, cybersecurity, or writing fiction. All in all, I just do things that are going to be worth it for my future and he just doesn't see it but it's okay because what difference does it make that he gets it or not? That was my short/long answer and I hope it helps!