Walter White was an amazing character, and an amazing, obnoxious douche bag.
Once he started cooking for Gus and went big time, they did an excellent job of transforming him into the jealous, big-headed, arrogant character that ultimately wrecked everything for everyone around him.
The first time watching the show, I thought he was a divided character, and I maintained some sympathy for him because of why he started cooking in the first place.
But when re-watching via Netflix binge, it's much easier to see what a shithead he actually was, mostly centering around his relationship with Jesse.
Jesse becomes a much more sympathetic character when you are watching things in quick succession... you realize he was basically just a kid that did some *bad* shit that needed help. Walter treated Jesse like he was a monster that was lucky to be connected to Heisenberg, when the reality is that Walter turned into an actual monster, and he did it of his own free will, whereas Jesse was constantly being affected by outside influences.
What Walter did to Jesse during the final season, out of nothing but arrogance and spite, was unforgivable. Everyone talks about Walt's redeeming act at the very end, but it was only necessary because of how vile he had been before that. He was directly responsible for all of the heartache that Jesse had experienced and would experience.
Jesse finally gets his shit together... Walter pulls him back in and wrecks it. Jesse gets out from under Walter's shadow and lets Walter have his throne... Walter pulls him back for no reason, and wrecks it even worse.
I wish Walter White had died from his cancer at the end of season one.