Both of them shouldn't have crossed Walt. Wtf was Hank thinking going out all the way to the middle of nowhere to arrest the most powerful drug kingpin in that whole damn territory? Mike on the other hand shouldn't have expected to go home safe and sound after literally denigrating and accusing Walt for his own mistakes which was hiring that bs lawyer in the first place.
But tbh Hank didn't deserve to die. He still had a good future ahead of him with Marie. His death happened too soon. Mike was already dead way before Heisenberg shot him. He was an old man and I don't think he'd have a purpose in life anymore. He'd just be hiding, afraid of what's gonna happen next.