My DH is a gamer (retro games/consoles, he is geeky as fuck
) He could probably sit and game and catalogue all his games and consoles in different categories 24/7. I read and could quite happily sit and read 24/7.
Ironically for all the gamers are Neanderthal fuckwits my DH is far more intelligent and knowledgeable about general stuff than I am. This is because he recognises he can't, or shouldn't, game 24/7. I also realise I can't read 24/7.
The issue is does your DP have the desire to sense to prioritise his DP over his gaming? On the face of it, it doesn't appear so. This is not good. If I were in your shoes, I would talk and set an ultimatum for him to show he can do this - if he can't, I would kick him to the kerb.
Of course one persons reasonable ultimatum to maintain a relationship may be another persons unreasonable wildly controlling attempt - in which case you're not compatible at a basic level. It doesn't really matter who is "right" and who is "wrong" - it's just that you are different people with different priorities and can't make it work.
I always bang on and on about two rules solving most relationships AIBUs - equal disposable income and equal disposable leisure time. It doesn't matter how people want to spend that leisure time - if you can't agree acceptable times it's not going to work anyway.
At the end of the day I have the desire to read 24/7 but my DH is important to me as well as reading. I want to prioritise a healthy relationship whilst still having time to read so we just agree what is an acceptable equal disposable leisure time in a healthy relationship and stick to it. This isn't set in stone, it changed as the DC got older for example, or if there was something going on (eg ill family member, I am stressed and DH recognises he needs to spend more time just being "there" with me)
It's the issue of equal disposable leisure time that needs addressing, not how you spend said time. IMO anyway.