That's not what their base believes. There is a whole other fantasy reality in their channels about how Carney has planned all along to cut a secret deal with Trump after the election. Other justification narratives probably exist as well, because they have to keep people believing that obviously, everyone knows we couldn't possibly do anything other than completely fold into Trump's plans. They spew propagandistic garbage like this and teach people to distrust legit media that understands context and checks facts rather than running with conspiracy theories based on flimsy evidence.
The conservatives still turned out a lot of votes. The left just voted strategically to keep them out. Next election the left will split again and we will get the conservatives again. Given the parties recent history even if it isn't Poilievre I'm sure they will pick another alt right sycophant.