We have only had bad neighbors once in our 35 years here. They were a young couple and the boyfriend apparently sold performance cars (he'd have exotic cars in the driveway on a regular basis). We only contacted the HOA once as she would let her dog out the front door and he'd run around, poop on our lawn and then run back inside. One email to the HOA took care of the problem.

I hope that you can get your problems resolved. Financial stress often results in family stress and your neighbor might not have had the best examples in growing up and raising kids; nor additional family resources.