What polls/assessments do you have that place him that poorly? The ones I've been able to read place him more in the "meh" category, not that good, not that bad.

Well for starters he supports the racist Stop and Frisk, the large soda ban, an actual plan to confiscate guns, the racist SHSAT entrance exams, wouldn't support LNY or Eid as a holiday, overstepped his term limits, literally bribes his way to office using his money not that of donors', says Xi Jiping isn't a dictator, uses prison labor for his campaigns, implemented those stupid public bikes and bike lanes, and turned NYC into a "luxury product", making gentrification much worse and displacing thousands of people of color. If he isn't one of NYC's worst mayors, idk who is.