Rental cars seem to be a mess. I know at least one person who canceled a trip because they couldn't get a rental car. And I reserved one for a trip at the end of September "just in case" and the price seemed significantly higher than normal.
Rental car prices are extremely high. That’s not your imagination. This is a result of car rental companies selling a third of their fleet last year to survive so supply is way down and demand came roaring back.