It’s how Canadians roll: we decide we like a party leader, we elect them, and after eight or ten years we decide it’s time for a change. It doesn’t matter who the other leader is, we just decide to switch.
The problem is that it’s a guaranteed pendulum between the Liberals and Conservatives. Without a third party, the out-of-power party just needs to wait. They don’t need compelling policy, they don’t need a decent leader, they just need to show up.