At least your xh was nice with the next email & offered his help. But I agree, you should be cautious.
I'm glad you are getting out & enjoying yourself. Don't worry about the neighbors. If that is all he has to do is stick his nose into someone else's business (yard) then he has more problems than he really knows. I saw a movie or show once that said if someone sticks their nose into someone else's business then it should get punched! That was a kid talking but it stands to reason. Of course you are not going to go punch the neighbor. I do think you are handling it very well. I have hedges in my yard also, I'm the one that keeps them trimmed but it does block out the neighbors although mine still keep an eye on what I'm doing & sometimes it's hard to go outside without them wanting to talk or something but at least I've got good neighbors & they are not telling me what I need to do.