[quantisan]

As others have said, this came after historically significant low popularity and mounting political pressures. His government faced criticism over falling poll numbers, by-election losses, and a broken agreement with the NDP. Tensions with the US and internal dissent within the Liberal party added to his challenges.

One of the final nails in the coffin was the resignation of Chrystia Freeland, his last standing ally and Finance Minister.

This video from CBC a couple weeks ago on Freeland explains the rifts in Trudeau's government well https://www.youtube.com/watch?v=8SuZTLWNlpc