Play your best team. Football is not fair! Look at Angus Eve missing Germany in 2006 to make way for Anthony Wolfe who didn't play a single minute. Plenty of examples at International level.
The coach needs to keep his job, it's his decision and he will stay or go based on those decisions.
Nobody on the outside of the camp knows the full story about injuries, lack of discipline, lack of fitness or poor attitude.
We all have a right to our opinions, but at the end of the day, let the coach coach!