The problem is the demand. The people with the money to have an airplane for travel almost exclusively live too far from a GA airport. Even where this is not true, the path to ownership is not attractive.
If you want to sell airplanes, you need to sell them to the general public and make getting the license something that is part of your channel to the customer. Forget about designing a better plane. Learn how to get people who can buy one to want one. Then build one that meets their needs.
Continuously trying to meet the needs of the niche group who go rent dented 172’s with instructors housed in tin shacks will keep getting the same results. You need an experience that people will talk their friends into trying.