Live-in Landlord Keeps Making Up Rules As He Goes.

What I'm about to say could be reduced to "My house, my rules." Okay. I wouldn't be disputing that IF... there were clearly defined rules that I agreed to beforehand. I started renting a room about 2 months ago, and the contract was pretty simple when I signed it. Now, my landlord is coming up with a miles-long list of petty opinions disguised as rules I could, with the license of reductio ad absurdum reduce to things like, "Lock the doors whenever you come in or leave by them..." (fair enough, but here's the clause) "...except when I want them unlocked." Of course, he won't explicitly say when that is so he can get upset because I didn't leave them open, but later accuse me of not securing the house when he forgets the nebulousness of his own rules. Or, just yesterday after he pounced on me for not responding to a text while I was sleeping, "ARE YOU EATING A PEANUT BUTTER SANDWICH ON THE WAY OUT OF THE HOUSE?!!! THAT'S NOT ALLOWED! PEOPLE DON'T DO THAT! THAT'LL LEAVE CRUMBS EVERYWHERE!" (He didn't care to hear my rebuttal that he leaves takeout garbage in the living room, and his boyfriend carries stacks of dishes and silverware out of their room every week, but I'm to blame for the silverware shortage because I reuse a single fork for work.)

In summary, he reminds me of that kid who makes up a game on the playground, but the rules are undefined so he can interpret them whichever way he wants to secure his indisputable victory. Is there any way to handle this? He won't listen to anything I say about it, he just wants me to agree and sign, until he comes up with yet another amendment. Is this even allowed?