Tbh a lot of the disparagement the NDP faces comes from the one time Ontario elected an NDP premier (Bob Rae, in 1990).
Too many people still believe utter nonsense and outright lies about Rae’s tenure, like he caused the 1990’s recession (it began 7 months before Rae’s election).
Here’s a good article on the stories that people like Drug Fraud still toss around like fact.