I lived in a converted Victorian house where each floor was a different flat, and literally everyone was just batshit.
I had the middle floor.
The people above me used to scream at each other in Italian at top volume practically 24/7. I mean literally scream and scream for hours without pausing for breath.
The people below me stole everything that wasn't nailed down, left their giant mountain bikes across the stairs so that no one could get up without problems, then I found out they'd told everyone it was a campaign to punish me for dumping a sofa in the front garden the day I'd moved in. Surely it was obvious the sofa had been dumped by the person moving out, not the person moving in? If you were moving and wanted to dump your sofa, surely you'd just leave it in your old property or dump it outside, not pay a moving company to transport it halfway across the UK only to dump it in the front garden of the flat you were about to move into where you'd have to see it every day?
Lower bottom floor was a woman who never went outside and had about eight dogs who also never went outside, except into the (unfenced) garden where the entire lawn was soon entirely covered in their shits, which she never picked up. The house was on a very busy main road in London and the dogs were just allowed to roam free, back door left permanently open. Anything could have happened and anyone could have just walked inside off the street.
And as a bonus, next door neighbours on one side had suddenly acquired a lot of money, did extensive building work without telling anyone, had their builders dump tons of stuff (like 10 massive bags of rubble) onto our front garden, building stuff all over our garden and driveway. They also installed a marquee with concert-quality professional speakers and threw an outdoor rave till 4am with genuinely 02 Arena-level noise, without warning anyone.
House on the other side was some kind of temporary accommodation place where, because it was a borough where you had to put bin bags directly onto the pavement on bin day (no wheelie bins or anything else) everyone just chucked their black bags of rubbish onto a giant pile in their front garden. It was literally a mountain of rubbish and stank to high heavens, clouds of flies all year round. You'd see people come out of the house, throw another bag on the pile, then go inside again. I swear the bags on the bottom of the pile had been there since Tony Blair was PM.
I left asap.