They update the ui in most of their patches, theyve made the ui incredibly customisable. They have the classic header or a ribbon header. Its open source software it can’t afford a redesign every few years to keep up with Microsoft design trends. The team is like 8 people.

I might be wrong but i feel like the people complaining about the ui dont really even use it. After a week of using it you get used to it and it looks normal.