No manager would want to take up a managerial job in a top club like Chelsea and get sacked before six months of his reign at the club and that I think is Chelsea's main problem in getting a another good manager at the moment.
The true context is that clubs are not avoiding chelsea because of the "fear of getting sacked in 6 months", instead top managers are avoiding the job because right now in london, the Chelsea football club is a mess on pitch, and off pitch. The owner Boehly has assembled a 600m squad who do not complement one another, over 8 attackers with no striker except "lukaku". over 8 midfielders with 1 cdm "ageing kante"
Its a big mess at Chelsea club, and to be candid; with patience and good clearout of unwanted players; maybe Pochetino might fancy the job