How to make Linux better:
Better quality control eg. no more issues like Ubuntu shipping a broken version of systemd that wont allow the system to boot.
Prioritize performance over FOSS purity in newbie friendly distros. A graphics card driver that gets 1/30th the FPS should not be the default for a 1,000 dollar graphics card. Anyone that wants the FOSS driver can install it if they want.
Avoid homogenization of software features. i.e. better support of the feature outliers. eg. KDE does not have an option to adjust contrast of scrollbars without a theme that specifically has that contrast. This makes it harder for the vision impaired like myself to use software.