Erm let's go with (semi)educated guess.... It's difficult to turn the tide when fans and press feel so strongly so quickly about a manager and his competence/ability.
Sometimes a player just doesn't fit a team and from time to time it happens with managers also..... Imo it's not even his fault ( so far ), he's been screwed from above in the window ( until the last minute if we're being kind ) and still didn't get a striker. His performance was going to be under the microscope instantly from some due to the popularity of our previous manager and where we finished last season and anything less the perfection was going to draw unfair (some would say ) comparison. I think he deserves 10 games from the close of the window, but if thinks don't improve almost instantly I'm not sure he'll see that
Next couple of games are huge for him imo