Lots of other threads discussing this topic. Many rental car companies downsized when covid first started when virtually no one was flying. In Orlando, you can lookup the media reports about a large number of rental vehicles put in storage that accidently caught fire and were destroyed. Rental companies will probably continue to have issues matching demand with supply as more people start traveling again. There is also a computer chip shortage that has impacted several industries, including car manufacturers. So in total, several issues have contributed to what you are seeing.