I was in my last place a number of years, it wasn't ideal in a lot of ways.
I made small improvements to make it more liveable because I'm fully aware of how depressing living in a shit house can be and how it affects you, like I said I've been there.
Anyway, when I moved some of those improvements were left behind because the LL was fine with the slight upgrade(s) and I had no use for them. Some of them - like the paint we had added to some of the rooms and lampshades for eg - were put back to original.
All of the improvements were done cheaply and with the understanding that this was not a forever home so nothing was a wrench to leave behind.
It doesn't matter to me really how much money you put in, the point of my post was that you put a fairly large chunk of money into upgrades for a house you weren't planning to stay in. Now you seem to resent having to keep to your agreement because of various reasons including how much you have invested in the property. You brought it up in the first place so it clearly matters to you how much you've spent so far.
You've been too open with your purse at times where your LL should have put up costs so yes they were CF in that respect, but I'm sorry you should have stood up for yourself in some cases because they were expenses the LL should have absorbed.
I'm sympathetic in some ways but you are acting quite badly and you are coming across as entitled IMO. You make an agreement, you stick to it whether you want to or not. You have no good reason not to here. There are lessons to be learned here but you don't seem to want to learn them.
I'll step away though because I don't want to upset you further and I do hope it all works out for you and you enjoy your new home.