By all accounts, Hahn made a serious run at Wheeler.
Machado - no. That was an embarrassing effort.
No one knows exactly which, if any, of Hahn's numerous howlers were forced upon him. The Leury contract smells of LaRussa, but otherwise, most of the moves have been Hahn-level stuff he's been doing for a long time.
But he's been GM for over a decade and he has had 2 winning seasons. He just needs to run along.