Without knowing your roles in the relationship, e.g. if you/he are busy at work or doing lots of other things in the home, it's difficult to know whether you are being unreasonable or not and I'm surprised that someone found it so easy to reach the conclusion that you are.
You sound pretty reasonable to me and are very complimentary about your husband in other respects. I have to say that I too would be pretty fed up if my husband was going out of his way to help others but was unwilling to listen to me when I say that the state of our home is getting me down. Instead, your husband seems only to be caring about how he feels (happy as long as he can get into bed at night) rather than caring about how you feel.
I agree with those who say if you possibly can afford it, things like leaks, mould and damp should be the priorities. And, as has been said, there are some things that you can do to spruce the place up - have a real "spring clean" - clean windows, carpets, paintwork, etc. etc. - but I assume there are other things that you aren't able to put right.
I wish I could say something more helpful because I understand how you feel - I would find it depressing if my house was falling into disrepair and looked very shabby (my house isn't picture-perfect, perhaps a little shabby in places, but I certainly wouldn't describe it as "a dump" and I would feel very miserable if it was).
I wonder if you have impressed upon your husband just how much this is distressing you. If not, I think you should. I think these sorts of issues - where one partner pays little attention to the needs or requests of the other - can ultimately build up great resentment and damage a relationship.
Boris Johnson referred to the police for suspected further breaches of lockdown regulations.