if you joined a non-democratic union to begin with, that's on you. This is a rare anomaly though and most unions have democratic processes you can engage with and bring the change

It is a democratic union. There are 100 workers and 55 are the leadership's cronies who keep voting them back in. Classic democracy, two wolves and a sheep voting on what's for dinner.

Also, how do you get to pick which union to be in? One can get certified even if you voted against it, or already exist at the company where you want to work.