Even glass might work, Find a beer bottle, shatter it and then wrap it with an old rag or ripped piece of a shirt

Hey uh, Op. Maybe Start having a knife under your desk. IDK but If he knows you know ur probably next when he runs out of Alan-Meatloaf.

Invest in a flamethrower if nothing else works

All I can think is that if you don't leave quick, your things will be amongst the trash in the yard, And your bodies in the walls. Stop cleaning, grab only what you think is most important and leave, he likely will not but he isn't himself. Run, Change your name if you need and start a new life