Dude, you are the one who is taking about him like he is a McKenna, not a Guardiola in terms of experience. Just cause he was not good enough to manage in EPL, before he turned 52, it doesn’t make him a young manager.
Put it this way, he is more similar to a Rashford rather than a Garnacho. Similar to how you expect Garnacho to make mistakes while learning, you also expect mistakes from the likes of Arteta. But when it comes to Rashford or EtH, it is a bit more frustrating. They’ll probably finally turn out to be world-class, but more likely, this is as good as you’ll get from them.