I'm 17 and have a holiday job to earn money for a new phone because I know that my parents can't afford it. Three days ago my dad told me that my work is worthless I don't really do anything there and that I am a human trash.
I can't believe he would say that. What was your reaction to your dad's comments?
I almost punched him in the face even though I know  that I am living on his money
Your dad should be encouraging you rather than putting you down. The best way to handle the situation is to remain quiet and only speak when you are directly spoken to. Arguing or trying to explain your perspective may make him angrier and put you in harm's way.
What would you do to the dad of a guy like me?
I can definitely understand why his criticism hurt your feelings. He should be more supportive than that. The best thing is to work hard at your job and prove him wrong.