Jesse Pinkman has become like a rabid dog.
He needs to be put down.
Jesse is the only character in the entire show who has expressed guilt for his actions. And now, rather than take the exit and save himself, he is on a righteous crusade to avenge the poisoned child.
That's far from rabid.
This issue depends on whose perspective it's viewed from. I so despise Hank and all he stands for I can't help being on the side of Walt and Skyler. So your earlier observation about being rooted in bias is correct in my case. I do identify with Walt for a variety of reasons.
Where Jesse is concerned, he's not a child. And because he's unhappy with the way his life has turned out he's chosen to behave like a spoiled little brat, destroying his toys, shitting his pants, and setting the house on fire. He could have dealt with his guilt by using the money he tossed away to do good things for countless deserving people, but he chose to act out and jeopardize everyone, blaming everyone but himself for things he's done.
I'm sure Walt will somehow pay for his sins, because that seems to be the rule in popular American literature and theater. He can't be allowed to get away with poisoning Brock. I expect some classic retribution, and knowing it will happen is why I'm able to ignore his negative aspect. My focus is on Hank, because there is nothing good about him. I want to see that egomaniacal bastard suffer -- along with his malicious, moralistic, kleptomaniac wife.
I just hope Skyler is able to get away clean and enjoy all that money in ways she is inclined to, which is helping a lot of deserving others. But I wonder who she will get to help her dig it up.