Unfortunately they are correct as the carbon tax in Canada is indeed a racket. It's only on consumer consumption.
oil exports, our largest source of emissions, are exempt
agriculture and forestry, the next largest, also exempt
shipping and rail, oh look, exempt
heavy industry can buy phoney carbon credits for $5/ton instead of paying the $65/ton tax. Some of these are for forests that have already burned down
oh yeah the greatest emission source last year, dwarfing all others, 80% of our total emissions came from the massive forest fires for which our policy is just to LET THEM BURN
So the only people who carry the burden of the Canadian carbon tax are the ordinary taxpayers. But hey, the optics are good! Looks very progressive. Despite the fact that Canadian consumer consumption is the definition of a drop in the bucket that is global emissions.
If Canada wanted to make a difference they would nationalize the grid, build nuclear and renewables. Or forget it all for now and just put out the damn fires!
Edit: I forgot one more, as imports are not taxed, the carbon tax actually encourages the import of goods made with coal power in China, over goods made with hydropower in Canada!