I understand and respect your decision to not continue, but I have to let you know that your feelings on it are totally justified and even vindicated in the final episodes that you didn't watch. The misery and frustration is intentional. The arc of struggle, glory/success, and awful consequences are kinda the whole point of the show, and there's almost some amount of cathartic redemption in seeing Walter realize just how badly he has fucked up and what he does with that knowledge. I'm being intentionally vague in case you or others decide to go back and finish, even though it's pretty unlikely.

One of my favorite things about the show is that it's very much a show that encourages discussion about morality in a very gradual way. Most people would agree that Walter starts off as a decent man, and he's become an evil man somewhere along the way, but testimony differs from viewer to viewer about where exactly that line was along the way. So I'm curious, as somebody who didn't finish specifically because of what a spectacular cautionary tale it was, where was the line for you? At what point did you stop rooting for Walter White?