Coaches always make moves based on who a team rallies behind.
Sorry this is new to you.
Plus....Russell OUTPLAYED him. What part about that do you not understand?
He outplayed him in pre-season. He surely did do that.
But McElroy outplayed Sanchez in pre-season, should he be the starter too?
And it isn't true that coaches always go with the guy the team rallies behind, and you also have to figure out when they were rallying behind the kid, in pre-season!
There are times when the coach has gone in the other direction of what the team was looking for, the Bronco's did it last year with Tebow, Brandon Lloyd was 100% against Tebow. The Bills didn't want Rob Johnson back when Flutie was doing his thing and the Music City Miracle happened.
I get what you are saying but no, the coach doesn't always follow the players desires in this situation