Was I wrong to vent to my friend about my abusive father and our fights?

If you read my questions, I am going through a very hard time with my dad, he is abusive and it has terrible impact on me.

I told my friend who is his cousins daughter everything, and how much I hate him. That we fight occasionally and I said it to everyone. She told me I shouldn't be talking bad about my dad because he's still my dad and my family situation is starting to take a toll on her and she has her own problems to deal with.

I told her that she, and everyone is on my dad's side and they are eager to back him up and they would die for him and she told me I am being a bitch for no reason and that I pissed her off.

Was I wrong to vent to my friend about my abusive father and our fights?
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