You have got to be kidding! Unions are a slim step above organized crime! And you actually think a union steward would not submit a name to the boss to make that name go away in the monthly RIF! Unions are a collective brotherhood running a vast protection racket on the theory that the company pays protection or the Union puts the company out of business. If the Mafia tries to do that they are prosecuted, but when a Union thug with a collective bargaining card does that he has your full support!?
Perhaps way back in 1885, Sam Gompers' efforts did a modicum of good in the face of the involuntary servitude brought by salaries paid in scrip at Company stores instead of in real Greenbacks, or in the face of dangerous workrooms in dark and dirty factories. Yet the reality was in the 19th century virtually everyone had to toil hard to survive in a time of no modern conveniences such as refrigeration or mechanization. The Garment Workers Union did not prevent 141 workers from dying in the Triangle Shirtwaist Company Factory Fire in 1911. Even in Gompers' time the Trade Unionism was anti-capitalist and still is now.
The most pitiful myth is that the Union protects workers from the company. When a union takes control of a workforce, in less time than it takes to say "Union card-check bill", the next question should be, WHO WILL PROTECT THE WORKERS FROM THE UNION?! There are a myriad of instances of loyal individual union workers finding themselves railroaded as scapegoats by their union leader onto the unemployment lines or even blackballed for not fitting into the personality cult of the Shop steward. The Union bosses are much more to be feared than any company official.
It's pretty hard to convince someone an idea is a "myth" when they've seen it with their own eyes.
That make the rest of your post nothing but a screed.