While I didn't Hate JG, his resume with us isn't all that impressive really. Aside from winning 2 lotto's and signing 2 mega FA's who only wanted to play here, he also Traded Mac and Miller for Howden and Hajek who are pretty terrible and a high 1st, Signed DeAngelo and Banished him 3 games into his new contract, traded Pionk (who looks great) for Trouba (then massively over paying him) and Lemeiux who he traded to LA for peanuts, gave now top pairing Ryan Graves to the Av's for peanuts. The whole Lias Andersson debacle... I'm sure there's more i'm missing, but he wasn't perfect and i'm not surprised.
JD was a shock, he is kind of an icon (esp in NY), but the rumor flying around was that he refused to fire JG. Who knows, hope to read this crazy story some day. Amazon really picked the wrong team to follow around this year for a Documentary.