What is the the coli's problem with Bernie Sanders?
Nothing really. Seems to be a well intentioned dude who is just a mediocre politician.
The problem seems to be centered around a bunch of folks who rose to prominence by claiming to be left leaning/progressive who now look to just be grifters or counterculturalists.
After half a decade of being fed their nonsense, nap and others are just enjoying pointing out that they aren't who many people suggested they were.
Hero worship probably set back the budding progressive movement of last decade.