The real issue is that historically we've had abysmal GMs--the last two cataclysmically bad--who have earned the fan and media's scorn. The myriad busts, awful signings or players we've passed up, players we've allowed to leave, etc. are all why these dopes get blasted.
Cataclysmically!.....guess that's means pretty bad......I haven't heard that word since my last divorce!
The inexperience of both GM's and Head Coaches certainly shows on the field every season.