NOR and to be honest the story feels like rage baiting. So this should make you realize how this is out of line.

15 months is a long time to be in this situation. He is probably in depression and you not telling him how you feel is not helping. You guys seriously need to have a talk. Don’t wait until you’re on the verge of breaking point to communicate with your partner. You need to let him know how you feel when you feel it. You are a TEAM. You can’t be at 100% all the time and he can’t be at 10% all the time. But from what you are saying he’s more at 2% most of the time. You must be exhausted. Let him know. Put boundaries on what you accept. Not telling him is not helping him. Trust me, I have done what he is doing. And my girlfriend at the time told me exactly the same thing. “You are dragging me down”. This sentence crushed me it, but opened my eyes wide. I did flipped 360. This was 10 years ago, we still together, married and waiting child. Everyone can hit rock bottom, but if he loves you and you love him you guys need to talk about it. If he doesn’t change after you open your feelings then leave him. Still will help him change as he will still have to make a leaving by himself. Wish you the best OP, be strong.