Windows 7 was a GUI horror show compared to pretty much anything else at the time. Ugly font rendering, e.g. Especially if you have a ton of open windows, Windows has always been amazingly bad at helping the user manage them. Multiple / desktops can finally be enabled since Windows 10 (without hackery), but are still a pain. The font rendering has improved but is nowhere near MacOS. I could go on for a while. In my experience, the only people who think Windows has superior GUI have never truly worked with other desktops.