Revolving door?

So Mourinho has got the boot again?  Chelsea have certainly had a bad start to the season, but this is essentially the same team under the same manager who won the Premiership last season with almost embarrassing ease, so what has gone wrong?  Or has in fact anything gone wrong - is this just an example of how much football at this level depends on confidence.  Once they had a bad start did that prey on their minds and become a sort of self-fulfilling prophecy?  As the manager, Mourinho has to carry the can, but that's the name of the game as I'm sure he is aware.  Wonder who they have got lined up to replace him?