We are between a rock and a hard place. No manager worth anything wants anything to do with us right now (a combination of our poisoned challice stigma and being the wrong time for certain managers, klopp etc only been at their clubs a couple of years), so we are left with the managers nobody else wants (no 'big' team anyway) so the only one from the original cast is martinez, a manager that barely avoids relegation every year (how ludicrous is that?!) and because of this he will be unpopular, and people will be calling for his head unless he wins most of his first 10 games, and what will they be singing? BENITEZ BENITEZ BENITEZ just like they did with Kenny during Hodgson's reign. Thus making Roberto's an untenable position.
6 months in. Sack. Replace with benitez. Good first 6 months. Tail off next season. Sack. Liverpool in an even worse position.
I'm deliberately giving the worse case scenario right now. Martinez could wake up on the right side of the bed and be the next ferguson (highly unlikely) but we are in a terrible position right now. The best candidates don't want us.