I agree with you and I think Pochettino as well knows that with the way things are going with Chelsea he may not longer be incharge of the club if Chelsea don't experience a positive change from now till end of September. Not only the supporters of Chelsea are chanting for him to be sacked but the players also are being fed up playing under him because it seems their performance can't improve under him and I see no confidence in him again as the head coach of Chelsea.
Positive changes in Chelsea's game will come when the injured players, which are necessary for Pochettino's system of play, recover. Another question is that if the team's results do not improve in the near future, then Pochettino's resignation may follow, although his guilt is not so obvious yet. In this situation, a head coach who does not have his own style and skillfully uses the available players in each particular match would achieve great results, but for a club of Chelsea's level of ambition, this is a way to nowhere, because it works well with average clubs, but you cannot build a leader's team in this way. Therefore, we still need to be patient and let them work calmly with the team.