Up to this point, they have been shouted down with an argument that is, effectively "Scoreboard. Obviously it's working, just let these guys cook."
To OP's credit, he has been consistent, and raised some of these same concerns in weeks prior.
But even if he hadn't, it's undeniable that a number of opportunities were bungled by the coaching staff. And fans have every right to be frustrated when what could be a Cinderella season gets put on life support.
BYU had a one-loss margin for error, and they spent that on a 3-6 team at home.