As strong as Pollievre seems, he is still very much beatable but only from the right. All attacks and criticisms of Pollievre have been 100% exclusively from the left, those will never stick. But if someone goes at him hard from the right, he does have some wide gaps.
There is a difference, sometimes a large difference, between liberal and leftist, but yes they are both to the left of conservative. It’s too bad that the Conservative party does not allow for libertarian voices. I suspect that the powers in charge of the Conservative party are strictly right wing and only tolerate conservative individuals so that the party can keep its prestige but block libertarianism because that could bring too much transparency.