Brother spent about 50 hours per week watching the news - Advice Needed

I experienced a breakdown when my brother spent nearly the entire awake day watching the news during lockdown, and now he holds animosity towards me.

2002: Bought a House Together
My elder brother and I purchased a property in London. My bedroom is a small box room that cannot fit a TV, while his bedroom is about twice as large and can accommodate a TV.

2002 - 2019: Coping with the Situation
During this period, we watched some TV and films together, although I was often annoyed by the constant news being on. I managed to cope as I was going to work and spending time out of the house.

2019: Diagnosis
In 2019, my brother was diagnosed with autism, although he probably received little or no treatment. A health worker asked me questions about my brother's behavior growing up.  I did some research and realised he was autistic - having previously not been too knowledgeable about it. He has never spoken about his autism - and might not be aware that i know. He has got diagnosed very very late and was in his mid 40s

2020: Pandemic and Lockdown
During the pandemic and lockdown, when we couldn’t go out, the situation became unbearable. My brother would spend almost the entire day that he was awake in the lounge, leaving only to use the bathroom, make tea, or microwave a meal. The TV would be on the news for 6 to 10 hours a day, even when he was busy working on his laptop. So listening to music or with the TV off on in the lounge wouldn't be an option. This relentless news was depressing and unfair.

Trying to Resolve

1. I pleaded with him on three occasions about how depressing this was, but instead of addressing the problem or reducing his news-watching hours, he then began closing the lounge door. This did not resolve the issue, as the lounge is a common area with an open plan to the kitchen. I experienced several breakdowns, and on one occasion, I stormed in and turned off the TV. Since then, he barely talks to me, even though we still live in the same house.
   
   
2. Further attempts to address the issue have probably worsened our relationship.  I told him how difficult it was for me- and all the points listed and it just descended into an argument.

Current Situation
He now only spends time in the lounge when I am upstairs or away. This change has not fully resolved the tension, as the underlying issues remain unaddressed.

Seeking Advice
I want to move out, but this is complicated because we bought the house together, and he has shown no desire to go our separate ways - though we could probably financially manage.