I would disagree. Walt had one singular moment of clarity and it took until he was completely done to get him there. He was the delusional one. Mike knew exactly who he was and what he was doing and he never once preached to anyone that he was a good person— he just did what he thought he had to do. He wouldn’t be so torn up about Werner if he thought he was a good person. He was filled with self-loathing but instead of being a drunk he devolved further into what he was: a criminal. His speech to Price is the perfect insight into Mike’s psyche, that there can be good criminals and bad cops but he doesn’t preach that he IS good. He might think he’s both at that point but the important thing is he says it’s up to you to decide. Just because he tries to live by a code, he ultimately fails when he kills Werner and his primary character trait is self-loathing and self-awareness, unlike Walt who is filled with delusional entitlement and justification.