Furthermore they are just political machines for uber liberals and other leftwingers. I've seen unions endorse candidates that actively are working against their workers interests just for politcal endorsements.
I've also lived in Canada for 7 years so I have seen and heard most sides.
Can unions be bad and corrupt sure. That is true of any organization that's why we have laws.
Do some unions have weird rules including not allowing anyone that doesn't know someone within unions ( in Canada ), sure again that is why we have laws.
Have I seen companies that specialize in breaking up unions ( again in Canada ). You bet I have.
Unions aren't a solution for every problem. But it's a solid foundation to build on. They are good at making sure that their members have some basic rights, which is lacking in most Canadian companies.
The anti union rhetoric is kinds of laughable because it's so obviously manufactured by special interest. Unions don't have anything to do with political leanings.
I'm really sad that a lot of people haven't experiences the potential of unions because they can be really helpful for people and it's really annoying that countries that pioneered unions like USA and Canada have left the intimidation tactics work. There have been many people killed so I do understand people hesitancy during that time. But the tactics are usually now bad brochures and videos.
I have not benefited as much from unions as other people but that doesn't mean that I don't understand people's basic rights to unionize.