2 that most certainly was NOT a comeback. if it was, it wasn't well thought out. there's no irony or self awareness to how bad it was either, it was just... awful. something like "yeah, so are your parents for raising such a disappointment." it hits harder, its at least somewhat clever, and honestly itd be funnier. what you said was just rude and added nothing.
3 thank you for following up on that, its a lot more helpful and less pretentious.