It is true that Manchester City did very poor last season in all competition but we shouldn't judge them from their past the season just started and they perform well in their previous games, I get your point though they are no longer powerful as before because they lost much game last season and they are still playing with those previous footballers no new player added but let's see if their performance this season will be better than last season.
I am not expecting much from Manchester City this season, because no player was added to them, so their performance might be stable or poorer than the previous season. But for now, let’s give them time to see what they will actually be displaying in the season. For now, I don’t think we should put much expectation on them. Just look at their performance in the Premier League this season, most especially the game against Tottenham. That is when you will start to lose hope in Manchester City doing anything better this season. But nevertheless, time will tell.