Picking McCree really puts you on the spot, people will absolutely rage if they die to a Pharah and you're McCree. Doesn't matter the circumstance, every Pharah death is your fault and may the gods help you if she ults and survives longer than "Justice r-"
As for Hanzo... Everything is your fault, and if you win you got carried. Doesn't matter if you were actually the one doing the carrying, or picking off the Pharah for your McCree, it's your fault.