Chelsea have since struggled to adapt with the huge changes to personnel and pochettino has not been able to galvanize the squad that was already on a freefall having work under Thomas tuchel, Graham potter and frank Lampard last season and also with the sweeping changes on the front of transfer I think Chelsea are still coming to terms with pochettinos method which notoriously demanding and require high fitness
One of thing that I know is really affecting Chelsea is the lack of persistence in the club management because most of the time the are always in a rush and tend to put too much pressure on both the new players and they coach and that have had a long repercussion on the club results which we are seeing right now.
Also, another crisis that have had a great negative impact on the club is the crisis that of the external political factors.