"living in it now a world in which everyone else did things like this -- looked out for each-other, helped each-other up, cleaned up and improved the things around them, and invested in great little bistros and sandwich shops and bookstores and parks and such because they recognized the value of having such things in their community."
I like that, except for the part where the house still belongs to the landlord, not to the community or you. I would pick up trash in the mountains, because the mountains belong to everyone (or the government, which in theory is everyone).
With the sandwich shops, I think capitalism could deliver: if people would realize the value of having sandwich shops in the park, they would perhaps be willing to pay for sandwiches, making it profitable to build nice sandwich shops.
Sandwich shop owners as well as people living near the park would be motivated to keep it nice, as it would improve both the sandwich shop and the value of the houses around it.
Maybe there are aspects of what you are doing that I don't see, though. As long as the landlord lets you live there, maybe you get to live in a nice place for a low rent. If you ever have to move, your landlord might write you a glowing letter of recommendation and make it easy for you to find another nice place. Then again, as they seem of the "not caring" kind, maybe they won't :-/