So is there another sofa, where you all move to? If so, why doesn’t he sit on that?
My DH has ‘his’ chair. My DC have ‘their’ spots on the sofa - preferred places. Not so unusual. But no one gets their own way 100% of the time.
What happens if you point out it’s selfish and annoying? Have you ever done that? You say you’re fed up and worn down - was there a point you challenged it or is it “just what Daddy is like” and you all kow-tow automatically?
I frequently point out to my DH if I feel his behaviour is a bit self-centred or his insistence on something one way is detrimental to the DC - if he’s picking a battle that’s not worth it. As I say, nobody’s perfect. But we have the discussion. I’m not scared to, I don’t avoid it.
Everyone compromises to live with other people. But if you’re the ones compromising - you and the DC - to only one person, the balance of power and autonomy in your relationship is fucked up. And it has to change, either by hard, upsetting conflict leading to change, or by leaving him to achieve autonomy.
Your job is obviously flexible round the DC which has allowed him to earn more. But it doesn’t need to be that way forever if you’ve got good qualifications and drive to succeed.
You sound so defeated. 