Forty per cent of respondents to an online survey by Leger and the Association for Canadian Studies said they have a negative opinion of Facebook, with half of respondents saying the social media giant should be regulated or broken up.
The vast majority agreed Facebook amplifies hate speech, helps spread fake news and damages peoples' mental health.
However, more than three in four also believe the social network helps them stay connected to their loved ones, with another 51 per cent saying it is key to sharing information.
Leger executive vice-president Christian Bourque says Canadians maintain a dependence on Facebook but not a strong affection for it, as the platform confronts an urgent corporate image problem.
Last week Facebook whistleblower Frances Haugen testified before a United States Senate committee that the company's products harm children and fuel polarization in the U-S, a claim supported by internal company research leaked to the Wall Street Journal.
Facebook Canada says in an emailed statement it continues make investments that target misinformation and harmful content, and it also highlighted the platform's banning of several Canadian hate organizations.
Conducted October 8th to 10th, the online poll surveyed 1,545 Canadians and cannot be assigned a margin of error because internet-based polls are not considered random samples.