The question that should be asked, to each manager, is why do you want to be Chelsea manager?
I have no sympathy for any Chelsea manager, because they know when they take it on, that at some stage, within three years, they are on their way, with a nice big payoff.
The manager has an international squad of 25 to work with, win a trophy or two, piss the club off, get sacked, move on to next job, with a skip full of reddies. A simple process, that works for all concerned. Afterall, which English club has won the most major trophies, since Abramovich took over...