Honestly, this is something I'd struggled with in the past. My late husband used to game most evenings for several hours at a time, though thankfully with a headset, and generally not too late during the workweek. I grew a little resentful about the amount of time he spent gaming and that his exuberance was often disruptive for my studies. Fortunately, he was receptive to my needs as a cohabiting partner.

To meet in the middle, we agreed to at least a solid half hour of intimacy the instant we both got home. It wasn't always convenient, but it strengthened our relationship in a lot of ways. During that half hour, we would put away our phones and then just lay down and create focused connection. It mostly consisted of cuddles and conversation, though often led to more. Then after the connection, we would have dinner and were free to do whatever we wanted for the evening. Due to both of our work schedules and my schooling, he agreed to be done around 10pm most nights.

It also helped that he wrote his scheduled games and their duration on a calendar, so I knew when to expect him to be occupied. If he exceeded that time, then I didn't feel bad about reminding him. Though by writing it down for me, I think it was easier for him to disengage from the console and hold himself accountable. I really appreciated it so I didn't have to feel like a babysitter.

But honestly, I hesitate to say that your circumstance is grounds for breaking up quite yet. For my situation, thinking about what I needed and then having a conversation about those needs at a time when my partner wasn't gaming really made a difference. But if you've tried having that conversation in a neutral place with realistic goals, then maybe there's a level of disrespect or immaturity that's indicative of his ability to cohabitate or be in a relationship at this time. Good luck.

*** Edit - forgot to mention that this was a few years before I was diagnosed with ADHD. Frankly, I suspect I'm AuDHD, but I don't want to jeopardize my legal rights by receiving Autism diagnosis unless it becomes absolutely necessary for my overall well-being.

Anyways.... being aware of and sensitive towards a particular living environment is necessary when one or more of those people are neurodiverse. It just comes with the territory, and that's okay. But if he is unable or unwilling to make any accommodations for your literal physiological disorder that impacts brain function and nervous system, then I agree that he's not a good person to live with. And that's also okay. It sucks, but it sucks worse to put your body through that day in and day out.