Although I generally thought well of him during his time here, he had an opportunity to break the Top 4 far more often than the season we managed it, and didn't take it, even in constrained circumstances. We were ahead of Spurs consistently, and Man City didn't feature for the first half of his spell with us. We could and should have beaten in what many years what was an average RS side to 4th.
Koeman and Martinez have/had much tougher propositions to get us into the CL.
I would despair as a Sunderland fan at his consistent negativity and belittling of his own team. They are as good as the other clubs down there, perhaps Palace aside but I dont see a great deal of difference with the other teams and they have Defoe.
This constant sulking is the biggest turn-off, and proves he was a million miles away from the sort of personality needed to succeed at Man Utd, let alone Everton.