Idk, I don't see people having as many UI issues on other devices as on 4th gen Apple TVs. I literally have to stop using the Siri Remote before I have an anxiety attack and use my iPhone as a remote because of how sensitive it is and a pain in the ass to use the app with the Siri Remote.
The YouTube app is a cross-platform mess that only begrudgingly supports the AppleTV. One of the problems is they don't really support the trackpad, it's built for a D-pad. If you stop trying to swipe, and instead just lightly tap on the top, bottom, or sides of the trackpad, it works a lot better. (Also, there's a setting in the settings app for how sensitive the Siri trackpad is.)
I've learned to operate within its limitations. The two that still frustrate me no end are:
One, every time you unpause, YouTube insists on covering the bottom half of the screen with largely unnecessary controls and "you might also like" advertisements for other videos (dammit YouTube, I unpaused
this video, that means I want to watch
this video - stop using half the screen to tell me about
other videos), and you can't dismiss this from the trackpad, only using the menu button (or waiting), and if you hit the menu button to dismiss it just as it decides to auto-dismiss, then the menu button performs its other primary purpose and
takes you out of the video. So infuriating!
And, two, when their lower-half travesty of videos and controls is on the screen, every time you move from the timeline down to the other controls, if the video is paused, IT UNPAUSES THE VIDEO FOR YOU! Dammit YouTube! I paused it to and brought up the bottom, you know,
have it stay in the same place while I went to add it to a list or something - why are you starting the video back up? It's precisely what I
don't want at the moment. It's like it's trying to trick you into hitting the menu button to dismiss the mess on the bottom half of the screen, and maybe jump out of the video entirely.
Also, serious points off for using the row under the video title to tell me that it's "Recommended for you". With upwards of 17 trillion videos on YouTube now,
every video listed on my screen is going to be somehow recommended for me - I also don't care how many times it's been viewed. Instead, tell me the
date the video was posted. Lots of times there'll be 3-4 videos from the same source, and I want to
watch them in order. Armed with the date I can do that. If all 4 just say "Recommended for you", then I have to guess.
The iPad YouTube app handles the video controls at the bottom,
and the date/info under the the thumbnail issues much better. I wish we could have that on the Apple TV.