Finn doesn't have daddy issues. He knows his dad's a jerk and hes fine with it. Finn ok without since Joshua raised him right and jake has his back like a real bro. Finn has MOMMY issues, in that his longtime crush PB is just a color swapped copy of his mother minerva that he only remembered subconsciously til islands.
>finn doesn't have daddy issues
There was an episode of Regular Show where Rigby's dad didn't give a shit if Rigby died and was more worried about some other material possession.
I think them working it out in the end was one of the few good things at the end of the series.