Try to work at a place that has a union and decide to not be part of it... then you can see the true face of injustice. Don't want to be extorted out of union fees? Good luck, you are better off working somewhere else.
This is not representative of all unions, and the union fees are generally small compared to the higher wages that wouldn’t exist were there not a union in place. Mathematically you give a little to get a lot.