I tested mine for an afternoon and took it all over the place before I started trying to source one. When I did I drove it 450 miles home and was surprised I could jump out without pain!
I came from a lexus and it was much more practical etc but then I wanted to change into a sports car. I think the storage is amazing for the type of car. Can get two sets of golf clubs and all the gear in! Magic.
Solutions, also try a tonneau cover to stop stuff rolling about the boot.
I'm 5' 9'' and a bit of a fat b**tard but I don't have a problem getting in and out etc. I think it's technique!
Buying a sports car is a buying into a lifestyle. If the lifestyle doesn't fit then maybe it's a bad decision.