Forget looks - I'd just be happy with rock solid.
The standard Ubuntu+Gnome desktop crashes far too often.
Now I have no idea whose fault that is ( graphics driver, window system, or desktop code - or all three ) - but it's been a persistent problem for linux 'desktops' over many many years.
Imho the bright side is that this has solutions and it is getting better. Linux can be very stable, look at servers to android or even steam deck. It's mostly hardware lottery that means it comes down to hw companies support.
The kernel is stable, the desktop ( in my experience ) is not.
I suspect a lot of the problem is in the graphics drivers - they just don't get the love and attention that happens for Windows, and definitely not the Mac ( where they intentionally keep the number of things they need to support low ).