Talent hides a lot of issues. Emmons came into the best collection of talent at SH in at least 10-12 years if not longer. With that he managed to finish in 4th place and 3rd place in the region. He benefited from a very weak sister region in the playoffs, as two years in a row the region swept in the first round. Emmons was a weak HC and the administration and fans had no reason to see anymore of the same. The staff would have to be fools no to see the same, my assumption is that they agreed with the consensus and we're thus branded traitors instead of liars.
As to why Martin? Simply put, if he were to get the job he would put those kids 1st. Taking the job in the first place would likely mean him leaving a job that pays way more than he could make in the school system. I don't know many who would be willing to do that.