A myriad of reasons, but one that often gets overlooked is that the Canada and the US use a first-past-the-post electoral system which is not used in Europe. Canada does not use proportional representation on a federal and (mostly, with exceptions) provincial level so our politics, like the US, trends towards a two party majority system where niche parties and politicians get shoved aside.

In the majority of federal riding in Canada, voting for the green party would be a waste of a vote and would result you getting zero political representation that you want. You might as well roll up your ballot sheet and smoke it instead. This results in people voting strategically to prevent certain outcomes instead of voting for what they actually want.

IMO it is the biggest failing of our political system and is going to send us down the exact same road the US is going down right now. We are already on the brink of losing the NDP entirely our federal green party is barely even a shadow in the corner.

We are a petro state, and our dollar tracks the price of oil.

They're weak because their candidates are weak and not serious leaders. They come across as single issue voters running for office. Or as environmental student graduates who couldn't find a job and are padding their resume.

They're also incredibly partisan. Like good luck convincing a Green candidate to endorse an NDP candidate who might have a chance of flipping a CPC incumbent. And I know someone is gonna reply to this with their tired tirade, "Expecting GReen voters to sacrifice their prinicples blah blah BLAHHHHHH."

I want better environmental policy. But the green party isn't capable of getting us there. Their candidates have no vision beyond themselves standing at a podium hearing the sound of their own voice. They have no plan to accomplish their platform and nobody interested in working with them either.

In my opinion, because the Green party in Canada has become the identity politics party instead of the climate party.

The last time I looked at the Greens, they seemed anti-science with their anti-nuclear leanings, and Elizabeth May's pseudoscience tendencies. There was also that whole mess with Annamie Paul that revealed some infighting. Looks like May at least tried to pass the party on to a newer generation with Pedneault but that failed too.

I'd love to see a competent Green party, even if I wouldn't necessarily vote for them, because I would hate Canada to turn into a two-party system like the US. The more serious contenders, the better. Hopefully leaders like Emily Lowan can turn things around for them.

Greens have become an identity politics party instead of a party concerned about the climate. NDP are going to go the same way.