Most of the boycotts are gaslighting- politicians looking to cash in on cheap political vibe. In the end, Canadians will go south for vacation. The weak Canadian dollar (thanks to the Liberals) is far more of a factor than any boycott.
As for Polievre, there is no evidence that he is a Trump clone. He is fairly centrist, practical, and a touch populist. Not sure where you are getting your election coverage, but the race is tight now. The Liberals have had their "honeymoon bounce" and have nowhere to go but down. Mark Carney is a terrible politician at the retail level. Unlikeable, uncomfortable, and far too cagey about his personal finances. Plus, his French is not up to par- notice how eagerly he ditched a French language debate with a major broadcaster in Quebec.
I predict we will see a slim majority Conservative victory. Less than the landslide if Trudeau had stayed, but a victory nonetheless.