Re: IntelliJ looking bad on Windows, I do know that JetBrains IDEs are still stuck on using GDI for drawing fonts rather than the new DirectWrite protocol. The poor quality of GDI (especially on high DPI displays) is very noticeable when you switch from Linux or macOS to a Windows app that uses it. I looked it up a while ago, and as I recall it was an issue with the Java runtime that JetBrains IDEs use.