It would be impossible to judge Frank Reich on a game where he was without 10 starters, two of them All-Pros, and all happening the day before, or even a few hours before the game. The Colts were facing a very tough opponent away from home, even though it is worth mentioning that Arizona was also dealing with their fair amount of injuries/COVID.
Still, this was a game where the Colts were without 4 starters on their offensive line for most of the game, without the heart and soul of the defense, with 3rd string safeties, and without their starting tight end.