The apps you’ve mentioned are simple web wrappers that display HTML5 content. If you go to youtube.com/tv you’ll get the exact same web page that these streaming apps display. They do this because it’s cheaper to maintain and you get the the exact same experience on every device. Not playing the devil’s advocate here, just explaining why these apps are so bad and why I don’t think this is going to change. In fact, Google did provide native apps on some plattforms and later replaced them with their low-quality HTML5 apps.
You are supposed to wear every watch like that. It’s no secret. But some arms are simply shaped in a way that the watch tends to slide towards the wrist/hand.
I don’t like having my buttons on the opposite site of the wrist either as you then cover the screen when operating the buttons or the crown. I strongly oppose this being the correct way to wear it, as some people proclaim. Actually, one of the reasons I got the Ultra is the button/crown guard. It minimizes the risk of accidental button presses, but they do still happen.