Your rental experience sounds worse than any I’ve ever had. I have to rent a few times a year.
Also generally I like the idea of renting and having the rental insurance on a long road trip so if something happens then my personal car isn’t totaled or put into a body shop somewhere far away. I’ve hit a deer hours away from home before on a road trip that was WAY worse. If it had been a rental I could have just walked away saying I have insurance so your problem, I need a new car. Where as it became an ordeal of the car being in the body shop 4 hrs away, still needing a rental to get home, since it was far away couldn’t check in on it and the repairs were bad, had to get a ride to get the car, ended up having to drop it off again somewhere local to fix the bad repair job, and get another rental.
I also had range anxiety for EVs on long trips and then I remembered that experience.