I don’t mean this to sound passive aggressive; I’m genuinely unsure: are you using “UI/UX” correctly here? if you’re getting exactly what you want from it, is that not good UX?
Its definitely possible for something to work and still suck to use. Just because you can get there eventually doesn't mean the experience of clicking through a dozen menus to find where a button has been moved with this update is a good one.
Maybe? I think that the system is poorly designed, but I can still do everything I want to do with a medium level of difficulty in achieving it. MyChart is way better than nothing, but it's not as good as "a good version of MyChart".