is my cousin being controlling? ive used the ac 5 times in 1.5 years and he still complains!!

I never turn on the AC bc my cousin pays for the utilities and am trying to be considerate of how much he pays. he controls the ac. I pay rent only and have only turned on the ac 5 times in 1.5 years. I noticed that the ac doesnt circulate at all in both my office room and bedroom, so ive tried to use a fan in the past and my cousin complained for that too so ive slept in sweat in 100 degree weather multiple times or was shivering all night during times of 40/50 degree weather. but today, I decided to turn on the AC for the fifth time bc it was 80 degrees in my room with the window open at around 5pm. after an hour, my cousin gets pissed off and starts being passive aggressive saying: "you know its 60 degrees outside and you can open a window. why is the ac on?" so I tell him that it is 80 degrees in my room and have him walk in it. he realized that it was hot in there and then i told him i have tried opening the window. but he still insists that i shouldnt turn on the ac and just crack open a window even wider. i told him I havent turned on the ac in a while and never do and its the fifth time i have. so I gave him way and was like: "you know what ill turn it off."

and then he turns it back on because he realized he was being an asshole so I came over and shut it off again. then he said : "oh you know i had to put the temperature to lower to make sure that it gets cooler than what you put before. the house is already 77 and ypu have the ac on for 77." all i said was dont worry about it and shut off the ac.

i still use a fan overnight bc its an inferno in my room and wake up in the middle of the night drenched in sweat. I started developing eczema on my face from the heat and exacerbating my asthma.

do you think he is being controlling? I am so tired of living here, I wanna move out!! should i do it