It's relatively unprecedented to fire a high profile FBI director but it's well within the right of the president. The continuing problem for mostly left wing political pundits is that President Trump ain't your daddy's president. Most honorable political appointees graciously resign when the president asks for the resignation but Comey probably thought he could bluff the administration and it didn't work. Comey could have retired with a relatively intact legacy but he was fired and that makes him a loser.