In Alberta the UCP is mainly supported by the oil industry, but also consider that the current policy about lowering the minimum wage was a policy car dealerships across Alberta wanted.
Now, I only pay attention to this stuff in Alberta, because I live in Alberta, but I imagine this is going to be the same across Canada. Public transit is working against the profit incentive of an industry that has been lobbying its way into North American city planning for a century, making themselves a necessity.
I know the push in Alberta against bike lanes comes from a movement of people who have been trading their cars for bikes as the cities have made it possible to commute without a car. Something I imagine car dealerships and gas stations across the province are not exactly thrilled about, maybe at first it was fine but now it's effecting their bottom line. So the Alberta government is taking a more hands on approach to ensuring transit is less affordable by withholding funds and interfering with things like the green line. They don't want bikes being a viable alternative so they attack bike lanes, and thats also why they paint walkable "15 minute" cities as some kind of sinister conspiracy.
Just follow the money.