I would say Chelsea was quite unlucky throughout last season.  Of course, we all know that every club would experience the same at least once in a decade. So for now it will make no sense if we keep pressing on the "WHY" of Chelsea's condition.
Many keep talking about Potter and Todd Boehly as the sole cause of the club's predicament while few speak about the way forward. I'm more worried about how the new chelsea would be in the next season, seeing that the club is already showing signs of a bad start by planning on selling Covasic and Kante.