I haven't had an xbox since 360. But the UX was terrible then and I've heard and experienced complaints from this generation. How about an actual good UX? Steam deck isn't bad.
The early XBox UI was great. Then Microsoft decided that what you really needed to see when you fired up your console was ads. Also some horrible Mii clone. Because the Switch was popular. It went downhill like a body over a cliff from there.
Xbox s is the only console (wait I have a switch too?) I've had plugged into my TV in the last decade, I'm not suffering the UI it could be improved in places, but it's not bad.
Whatever the most recent one is, without an optical drive. It was a present from my wife and I can't keep up with them sadly. It's the first console with a UI (besides the switch) that I've had, and it really does work for what I use it for (access to games via gamepass whenever I have an hour or two)