That sounds difficult. Yes, I have similar experience, not to your extent, but similar.
I recommend couple therapy. There is for sure one or more underlying issues on his side, he maybe doesn’t even realize it.
As I’m highly allergic against people telling me how to organize my life and I too have emotional loved stuff from my late parents and grandparents. I only can tell what I did: Storing my things in the cupboards and racks I bought and tell my ex to do the same with his stuff and tell him his nagging hurts and he better shut up and mind his own business, this is not his alone party or a hotel, this is getting along as couple and find good ways and compromises.
Well, finally I sorted him out (for other reasons) and since my life is neat, organized and tidy.
Have an open conversation about how his behaviour makes you feel and what you both expect. Sendingyou strength and hugs.
There’s a thread on decluttering if you would like to check it out. You’re not alone with this problem.