The question came to me because I am watching The Americans Season 5 and I think Philip and Elizabeth are just dreadful parents to Paige and Henry
In the early series it was just deceit and neglect but as time goes on they just narrow focus on Paige and damage her and basically don't seem to care about Henry at all, when they find out he is gifted, Elizabeth is borderline sneery about it because it doesn't fit with their "Henry is a bit of a waster" narrative
I also hate Adam Braverman on Parenthood, though several scenes regarding his autistic son are very well acted, he is consistently a massive wanker to eldest child Haddie, to his siblings and his wife and is in general an arsehole.
He will often disregard Max's boundaries, behaviour management strategies and schedule if it doesn't suit him and what he needs regardless of how it impacts Max, whilst at the same time throwing massive hissy fits at anyone he thinks hasn't made adequate adjustment for Max regardless of whether this is accurate or fair. He gives me the absolute rage even though it's a great show and fictional 
The Gellar parents treatment of Monica though played for laughs is really not funny at all