I mean this is part of the issue for me with appointing a complete novice manager. We have no idea what his level is or what his skills and weaknesses are. It might be that Arteta just isn't cut out for the job.
All we can do is judge him on his performances and I don't think an unknown manager is the one you say we just need to give them time personally. If we are continuing like this through the season then I think we should be looking to move to someone else.
Arteta was well hyped up by people in the media but it was mainly about his role at city and talk if potential which I don't think is that insightful into what type of manager he is our could be.
At the time I thought it was a bad move for Arsenal but also for him because he was always going to be under big pressure and the club aren't performaning as they should across the board.