Krystopher,
First of all, you've seen Firefly and loved it enough to find and join us here. Not Worthless.
Second, You're smart enough to know this is a safe place to vent, Not Worthless.
I had a father that made me feel that way too. Unfortunately even after he's gone his words sometimes fill my thoughts. You shouldn't have to go get a degree in Psychology like I did to figure out that typically when others say and do things that make you feel bad, it's not you, it's them. Pity them. They have issues. Don't let them pass their issues off on you.

Hey free to vent away if it makes you feel better

I assume you aren't fishing for advice because you're a bit scant on detail but at least from my perspective you are by no means worthless Krystopher