I would strongly argue that Comcast would be a huge step backwards even for the Canadians. "Comcast Is America's Most Hated Company" [0]. Roger's 10.2 million wireless subscribers lost connectivity for maybe a couple of days. Comcast has been failing at servicing more than 31 million broadband internet subscribers for decades. Comcast has also done everything they can to destroy net neutrality. The sooner Comcast is a thing of the past, the better.
Having dealt with most major Canadian ISPs and Comcast, I think the only Canadian ISP I would rank above them is Telus. Maybe Bell depending on the province.
[0] https://www.pcmag.com/news/comcast-is-americas-most-hated-co...