I haven't went to a movie (either by myself or with someone) in over 20 years. The reasons are many. You have mentioned a couple of them:
a. I don't do fake very well
b. Friends will be a needless drain on my energy. I don't want to hurt their feelings, but I know I would turn them down when they want to go out or do something. It is better just have acquaintances.
c. I would have to go during a daytime showing where very few people are watching. I don't want people near me when I watch.
d. People just bother me, for various reasons. Not everyone, of course. Some people are great, especially if they are positive people. But the chances of that not good.
There are other things but you get the idea. People suck. Mostly. Not intentionally, but they are not who I want to spend a lot of time with. Exceptions will know who they are, because I will tell them. It is a small group.
I totally understand where you come from, I’m the same, just maybe not as extreme.
I tried going on an odd hour where I assumed wouldn’t be many other people, and even checked the reserved seats and there were only a few so I thought it would be really peaceful. Turns out the theater was maybe third of the way reserved. But all the seats around me were empty. It was a pretty good croud this time, though one man was snoring the latter half of the film 😅
As long us we have internet, we can be social on our own terms.