I don't want to dismiss your experience out of hand, but...how long had it been since you last turned it on? When I play my Switch regularly, I don't ever turn it off all the way; putting it to sleep (either by pressing the power button in handheld mode, not long-pressing it, or by holding the Home button on my controller and selecting the option to put it to sleep in docked mode) doesn't lose much power overnight even when it's not on a charger in my experience. I also don't really remember having either frequent or extremely larger updates very often on any of the games I've played, although I guess I might just happen to play games that are on the lower end of update density. I don't think I've ever _ever_ had any sort of ad that I had to dismiss before playing a game; the closest thing I can think of is the "News" app, and I definitely find it a little annoying that there's no way to completely disable the notification dot on it or (even unsubscribing from every possible channel in it doesn't seem to fully stop them) or uninstall it, but it doesn't actually cost me any time unless I decide to go in and mark all of the stories as "read" to make the dot go away.