That note is horrific. If someone had sent my grandma or my parents that, I'd be livid. I'd also be planting a load of banked flowers to read "fuck off' when they bloomed!
The only part of that note that had a point was the bit saying the walkway used by many was a mess/had a lot of stuff on it as I can see why that might be an obstruction. A POLITE request to remove some things or offer to help move and tidy things because of obstruction would have been understandable.
There's no need for the superior tone, the judging and especially the sneery, snobby, classless paragraphs at the bottom. Even if you think something isn't attractive, you don't say it. Especially not like this.
@plodalong12 do you not think a residents association issuing a fine of failure to maintain or letters warning of a fine for such would be politer, less personal and not be so superior and judgemental? Certainly no RA I'd want to be bound by. Again, if my grandma - who lived in a little development, or my parents- who live in a village with a RA, got a note like this, there would be trouble!