Should Flores be fired if they go 0-16 and are still this embarrassingly bad? Sure.
However, the Dolphins are in the same predicament as they have been for years because Stephen Ross - either out of misplaced loyalty or stupidity - doesn't know how a rebuild takes place. You don't keep someone from the previous regime in place - i.e. keeping Ireland when Sparano was fired, keeping Philbin when Ireland was fired, keeping Grier when Gase was fired, etc.
Ross has shown he is willing to pay money... why not go out and get a proven football executive to come in, set up the organization, hire the right coach, and follow his strategy? Instead he promotes Grier who is getting his first time running a pro operation and who does not have the background of learning under a proven winner.