Aw, Lyssy,
I totally get that. I have been putting some money into replacing carpet/flooring, redid my kitchen (flooring, countertop, sink/faucet), but I know what you mean--there's a limit to what you feel like doing when it feels like a losing battle.
I don't even consider the VALUE of my home anymore except what it is worth fixing up because it makes me feel better. For me, the improvements I made did make me feel better about my surroundings. I live alone, though, but I do understand the resentment that builds when it feels like you're the only one trying to make things better.
Hugs, and I hope you are able to find a nice apartment in your future. I spend so much time at home (working from home these days) that I need to feel comfortable there.