Yep; see my other post. Let me add one to this, perhaps it affects you?
I'm fussy about what I like, I buy a CD, rip, and listen. Usually I want to throw that track away after a few listens. You can't delete the track you are listening to (you can sort of, depending on how you found it via the UI, but usually you can't) so you must remember to delete it at home on your main computer. That's a major feature for me and it messes that up.
I do the same - buy CDs, rip, archive CD away in a box as my backup. I don't delete though. I approach my huge collection as stuff I know I have, and who knows - sometimes I'll listen to something I haven't felt like hearing in a decade, so I like knowing it's there if I hunt for it.
I do agree with your post - the UI is bad. Even with the tiny buttons, a better UI would be nice. It seems to be designed for people with relatively small collections. I find this a lot - devices that market to audiophiles emphasize sound quality as all that matters, but often ignores that audiophiles may also have massive music collections. They usually suck on the "how does the audiophile organize and find the music they want to hear through that fancy expensive hardware" aspect.
I'm fussy about what I like, I buy a CD, rip, and listen. Usually I want to throw that track away after a few listens. You can't delete the track you are listening to (you can sort of, depending on how you found it via the UI, but usually you can't) so you must remember to delete it at home on your main computer. That's a major feature for me and it messes that up.