Well, my opinion on why he is definitely upset is mentioned above, but only indirectly.
I have already mentioned that the immediate neighborhood may not have anything to do with friendship, but is rather seen as a _private environment_. And there, a casual demeanor counts more than a formally correct one. The latter is then more often seen as snobbish.
To me, reading the last posts, it seems as if you have not adapted your behavior in an area where people already more or less accept each other as neighbors and live side by side. Even less so have you initially subordinated yourself defensively. It sounds awkward, sounds even worse, but just formally referring to your rights does not go down well.
And even if you think you don’t need to be friendly toward a neighbor (even if he is the biggest a*** in the world...), this kind of behavior comes back as well. You can get along well with an a*** without crawling.
This is rarely envy. Usually, the behavior of the younger generation is somewhat strange – especially when they can afford certain things.
I know you have a different opinion, but you can ponder it [emoji6]