I completely agree-we've all got far more time on our hands and are expecting far too much from what is essentially just young people making some videos for fun.
I only started watching anything on youtube last year when I started working from home and had lunch hours to fill. I really loved Grace's back catalogue and I watched probably everything she did. I don't have a problem with her being quite childish, I've seen far worse in 20-somethings. Lots of things that suggest "maturity", like living away from your parents doesn't improve someone's capabilities or create more interesting content- look at ClickforTaz who I genuinely feel a bit concerned about given her lack of basic skills like the ability to eat to keep herself healthy, or EmmaRectangle, who has gotten terribly boring and repetitive and never gets videos up on her schedule and always seems miserable and complains about how much she has to do while not really doing anything?
She has a lot of motivation and social skills and that can carry you a long way when she does move out.
My only gripe really want how she went to Brighton for a nice day swimming in the sea with her friend when we were all being told to "stay local". I was also a bit miffed with all the trips to the supermarkets but it's not bad in the grand scheme, just thought it would be bonus content to see her plan things like that. Like, to see the thought go into "hey guys, I can't go to the supermarket every day to get stuff for my videos, so watch me plan, and then we'll go do one big shop".