My dad's always been dismissive of my mum and I know it drives her up the wall but she always lets it go because she knows he loves her and it's just how he is. If she brings it up with him he denies it, derails the conversation and she gives up.

Recently he's started behaving like that with me (I'm 20 and just moved back home temporarily whilst I save some money) and I can't stand it. Examples:

-He recorded the wrong version of a programme on TV and I offered to show him how to get the right one on catch up. He kept talking over me then went to get a drink from the kitchen as I did it then left me waiting 10 minutes telling him I had it up on the TV whilst he called back "wait a minute" before he just left the house to go back to work without explaining or apologising.

-He was telling me about this prisoner in Louisiana who's being wrongfully kept in solitary confinement for decades and we started discussing the problems with the US prison system. We agreed on a lot but he disagreed that some sentences are too harsh then as soon as I tried to explain my point he picked up his mobile and phoned my uncle for a chat then told me to shush in the middle of my explanation. I left the room, pissed as hell and went to read in my bedroom then he dared come looking for me after the phonecall and tried to get me to watch TV with him pretending nothing had happened.

He's always done it to my mum and I've always been frustrated she let it go but him doing it with me is a new thing. It's infuriating and I know if I try to discuss it with him he'll either ignore everything I say and/or get extremely angry about it and take it out on everyone in the house for a couple days (he's never physically abusive but he becomes a douchebag when he's angry).

If he wasn't family I'd cut him out for being dismissive and disrespectful but he's my dad and I'm living under his roof.

Do any of you deal with people like this? How do you do it?