That's all I use. The youtube/youtube tv apps on appletv is pretty much the same on the apple offerings. HBO, not sure what the problem is.?
Have you not used any Google, HBO or Amazon apps?
"Optimized for Apple TV" is not how I would describe their offerings - at. all.
The only app that if ound annoying recently was peacock. But I find anything made by comcast/nbc annoying in general.