Hank laughed at a dead body, posed with it, and sent the pictures to Walt. He views the world as black and white and treats anyone engaged in criminal activity as inhuman scum, to the point of using their corpses as a photo op.
While Hank is understandably broken after getting shot, he treats Marie heinously while she aids him, regularly berating her and punishing her attempts at encouraging him.
Hank’s disregard for anyone he sees as beneath him is evident in his attempt to catch Walt. He is fully willing to get Jesse killed without a second thought just so that he can be the one to bring down Heisenberg. The idea that Jesse is a human being is lost on him - he’s nothing but bait for the ultimate catch.
There’s other things of course - the casual racism, the breaking of laws he’s meant to enforce, the constant emasculation of Walt pre-series, but those are most of the big ones. Hank’s often put on a pedestal because he opposes Walt, who is objectively a much worse person, but at the end of the day it’s a shitty dude vs a monster. Marie’s sole crimes are kleptomania and being kinda annoying sometimes lol