It might be useful to give a brief - and anonymous - rundown of the basic problem: people who've been through similar issues might be more motivated to respond.
Fair enough. I'm fortunate in that I've fallen out with almost everybody *except* my neighbours. I did once have a kind of party wall / land registry / chimney rebuilding issue with one @rsehole, but he'd moved out three years previously, so there was no glaring over the fence or banging on walls.
Yup glaring over the fence, banging on the walls, standing on a chair ranting over said fence , I get it all. The wife gets the most of it, sees her as an easy target, little does he know...