He just has to be given time. He certainly isn't immune to mistakes and poor judgement, but you'd hope that spotting those mistakes and taking measures to rectify them quickly within the resources available would be one of the characteristics of what has made him so successful.
The only thing is that he is just not used to working with a squad where the overall quality is this average, so perhaps he may be only getting to grips with that now in his own mind, and what has to be done differently.
I am quite concerned though, in that there still is no discernible identity to the team, we still lack leadership and intensity, and we don't seem fit enough either. There is no absolute guarantee that things will work out here for Ancelotti. He has to have the personal hunger to succeed, if not, the lack of it transmits to the players, and then its back to putting a mediocre shift in with similarly mediocre results.
It's concerning when you look at Southampton for sure, but its still early days. It's where we finish, but if that's outside of European qualification, it would be an enormous feeling of letdown. Ancelotti has to improve us, he has to improve the players available to him at any given point, and find better players. I don't accept that we are destined to just plod along without more investment, though that's needed. Everyone has to do better.
Richarlison's form, or to be more precise, focus, is the biggest concern for me. We are missing goals and therefore points from that source already this season. To me he increasingly looks like he is playing out time here, the conviction and confidence from his play has gone, and he gives an air of a player not expecting what he is trying, to work. We need him fit and focused so Ancelotti has to get on top of that very soon.