Warren’s campaign is more a critique of policy & structures, not the people who made them.
I think this is a really strong point that gets to the heart of the differences between the two campaigns. Warren and her campaign are doggedly focused on dismantling and reshaping the actual, structural foundations of inequality, whereas Bernie and his campaign seem to be more concerned with, like, punishing individual bad actors. Two moments in their respective campaigns that really exemplify this are Bernie's recent comments on Jeff Bezos and Liz's principled refusal to hold a Fox Town Hall. Warren's critiques are deeper and more systemic, and as such, don't endear her to the fringe left who are more concerned about, like, (righteously) dunking on centrists and MSM journalists on twitter. Bernie's campaign is like candy for these people, and I think that's why his campaign is imbued with this sort of dark, retributive energy. Warren's political vision is relatively much more positive and brighter. Bernie points out what's wrong with the system while Warren promotes ways to fix it.
The interesting thing about this Warren-Bernie dynamic is that Warren actually
does often talk about punishing individual bad actors (mock crying for billionaires whining about her wealth tax, her "Good." response to Peter Thiel comments, hand rubbing the idea of taking Delaney's wealth, etc) and actually follow it up with a policy platform (wealth tax, personal financial liability for Wall St. execs, criminal liability for Pharma execs, etc) that is ironically more confiscatory and hostile to the individual bad actors than Bernie's policy platform. So I think the reason Bernie gets praised from the fringe left and hate from the center is more stylistic and historical than any other reason.