You CAN hide games on account independently of the family sharing now, It's in properties of each game. Of course these games are still accessible in the hidden section, but i don't know where that is.

You do need one account per child, or you let them play on your account. You will need to hide the games on your own account in that case.

I like the Switch Pro too, those are a bit better than xbox one for the small hands. Still enormous, my 3 years old started being able to use it only recently, while the basic switch controller was usable earlier (2 years old).

And yeah, sorry for the tone, I'm frustrated with the switch controller configuration handling. If it wasn't for that I would get less meltdown when mario party messes up the whole configuration