If I was a Charger fan I think I would be more pissed at the GM and trying to get his head on a platter.
He fires a coach, respected by the players and coming off a great season, after both OC and DC have left for other opportunities. In addition, all of the other HC vacancies had been filled. So basically, he had very few options on a head coach and the new hire was limited in options for the two coordinator positions. Add it all up and it spells trouble.
That being said, Turner is a bad HC and will likely be gone after only 1 year.