How do i tell my dad to manage his expectations about our 9 week old pup?

Hi everyone. Me (20) and my family just got a puppy at 8 weeks old and altholugh shes been sweet and adorable my dad (52) has been getring frustrated at me because I apparently havent been doing a good job training her because shes been having accidents at the house and has been teething. He knows full well what he got himself into since he has raised a puppy before but I can't help but feel being unfair to me and has been asking me for her to be fully potty trained already. Its been making me feel bad since shes only 9 weeks old and sti getting a grasp of things and im afraid he might do something to the pup if i dont meet his expectations