Sorry, I forgot you weren't American. The point still stands. Vote and get involved in your country's government. Ally with the relative center in electoral politics; that's how it fundamentally works for leftists. Until the left is a majority, you will need to ally with liberals. The executive leader will always be a compromise with the center, even if they're from the left. That's why voting is only the starting point. Visible dissension alone is powerful, so make yourself hard to ignore.
I provided an in depth essay, but "vote Biden or else we're doomed" is still the bottom line. The jabs helped me determine how valuable the essay would be. If you were a full on troll, you'd have crashed the conversation when I showed disrespect. More importantly, it's fun to be sassy :)