Bit off-topic. I mostly use Linux and I'm of the opinion that it's miles better than Windows, but I don't fully understand why people say MacOS looks bad?

Ignoring the current Tahoe mess, MacOS felt relatively polished. I'm purely talking about UX here, as the OS is evidently buggy. The most popular Gnome themes are a re-impl of MacOS, so I can't be the only one.