Well he treats his lieutenant Nemu Kurotsuchi who just so happens to be his artificially-created "daughter" like crap. He treats his "daughter" مزید like an object and constantly smacks her around, belittles her, and expects her to grievously injure herself for his sake in battle. Plus when Szayel Aporro Grantz nearly sucked the life out of Nemu, Mayuri reinvigorates Nemu through offscreen means
Ging Freecss from Hunter x Hunter. (Sorry Spritle, I beat آپ to it again. Hahahaha).
He's a deadbeat dad. He's single, nothing is known about his son's mother, he dumped the kid off on his sister & mother & took off. He challenged his son to come & find him, while also telling him he did not want to meet.
Absolutely everything Gon has to do to find his father puts his & his friends' lives in jeopardy. Plus when Gon was in the hospital, his father was told, but he never visited even once, even though Gon was at death's door. The attitude he gives off is "Well, if Gon dies before he finds me, then he was not worthy to be my son."
So he & Gon do eventually meet & talk. It really pisses me off that Gon didn't مککا, عجیب الخلقت the old man right in the face (Leorio did that for him; he punched him real good).
I'd post a video, but the عملی حکمت hasn't gotten this far into the manga yet.
Look at this bastard; 32 & he doesn't look a دن over 18.