Advice for miserable husband

My partner seems miserable these days. As if if he could he would go back and not have any child even tho he LOVEEEES his son. He's a gamer and recently I told him I wish he could wake up at 9h am to help me out because my son climbs everywhere etc. We kinda had a argument before deciding this because he was gaming for hours before bedtime and waking up much later than me and I don't think it is fair at all. He agreed and everything was going great! Now nothing changed, his work schedule haven't changed he still wakes up at 9 even later sometimes but he games until 2 am!! He's always sleepy and even my dad started to tell him why are you always tired o.0 He replied: I never sleep! As if he were complaining. I was like well because you game late. And I said in general he seems miserable because I can feel that he misses a lot of things before having a child. It kind of affects me and the mood is not the best.

What the hell should I do? I can't force him to do anything and it's okay if he has a hobby. I just think not only he does not feel bad but he thinks it's unfair lol.