Dave.

Change your thought patterns. Minimise their actions in your mind.

They are not “psychopaths”, they are just “idiots”.

They do not “counterattack”, there is no “attack” from your side. They are just “being a nuisance”. Frame all the bumps and thumps as renovations if you want.

When they make a noise, turn UP your tv, just a little, so you can hear it over it. “Gee those renovations of theirs are a bit noisy, maybe I should put in a complaint.”

When they rattle the ceiling of their apartment, “Hey it must be time to vacuum, thanks for reminding me. I’ll do it now while you’re renovating and making noise so it doesn’t disturb you too much”.

“I hear that plants respond to music so I’m just going to leave some on for Ferris, my pot plant, while I go out shopping for a few hours this morning” - Not too loud, just loud enough for Ferris to enjoy it. If you hear a lot of thumping it must be just them taking the opportunity to renovate while you can’t hear them. I do hope they don’t damage their ceiling with all that thumping while you’re out, oh well.

All that activity on their part takes a lot of energy, your activities take very little. Which one do you think is going to end first?