Is it possible to tell my uncle how much of a deadbeat my dad is?
Is there any bad blood between you & your dad? Are you serious about the deadbeat father thing?
Yes, there is due to my uncle's influence sad to say. But he is right.
No matter what your uncle is saying to you about your dad, it isn't right to talk bad about him to your uncle. It's better to stay neutral in these manners.
I want to get even with my dad and use his mistakes against him.
It's not okay to want to get revenge on a family member. I understand not liking your father but to actively want to get revenge against them can end up causing more harm to him and yourself.