Alison Morrow interviewed him about it, link:

https://www.youtube.com/watch?v=a6mD-DkDXFg

Main reason he left was for his kids - something called Bill 15 in Quebec which prioritizes the interests of children over all other considerations, including the interests of parents.

You can probably already see how the government making decisions about the 'best interests' for the child over the parents would lead to a ton of issues, especially with an ultra progressive government like Canada's.

The other reasons he listed were the C-11 bill regulating content for YouTubers (i.e. censorship by another name), the government's authoritarian response to covid, the further restrictions around guns (which were already highly restricted), and Trudeau continuing to be a tyrannical shitbag.

He also feels that people aren't pushing back hard enough and this means things are not likely to change in the next few years.

Can't say I blame the guy - I'd probably be looking to do the same if I lived there.