"The only thing that helps against horrible neighbors is moving. If you've never learned that lesson, you've never had horrible neighbors."
Having lived next to a terrible neighbour for over 20 years, I can confirm a horrible neighbour never changes into a considerate one. And often they're the ones that never sell or move (why would they, they're having a great time..). Almost all the neighbours properties around here have been sold a few times, but not him.
Lucky we've been lucky with our other neighbours who are (currently, and most of the owners of the past too) all very nice people.
We'd love to move, but we really like the location, house and garden. That and anything similar is priced out of our range.
We used to think we got really lucky with the price of our place, but maybe no one bought it because they knew the neighbour that lived there.
But yeah, if you can move, move. Don't hang around hoping things will get better, they usually don't.
I stood my ground once against an awful neighbor. The neighborhood was a fishbowl and he already had a bad reputation that he wanted to pretend didn’t exist. My spouse and I put up a fence on the property line and nowhere else, which really embarrassed him. And at one point we figured out he was eavesdropping on us. I found out he had a record and so I started talking with my spouse in the room he eavesdropped on about getting a restraining order and about his record. It took about 3 months but he eventually packed up and left.
There's a guy in my neighborhood driving a 20yo BMW with a modified exhaust. He also has a motorcycle. If I tried to move to a more expensive area, I would have a guy driving a 5yo BMW with a modified exhaust - the building two blocks away is literally that - 40% more expensive, asshole in an M3 flooring it every time he drives out.
A friend of mine had a prolonged conflict with a neighbour who lived off of his dad's money and who would pound his Porsche at any time he would feel like it.