As a dueling anecdote, I know plenty of libertarian/right-leaning folks who privately tell me that they totally understand that teachers (regardless of unions) should not have to face a highly infectious disease in classrooms just so a bunch of double-income parents want to keep doing their office jobs over Zoom. The current problems have almost nothing to do with unions directly.
In reality though we just went from one anecdote to two. We are unable to tell when something is universal experience just by hearing more anecdotes.
And even if we somehow got to negative universal experiences, those very well could be:
1. Part of a conscious tradeoff (e.g. firms being less profitable due to higher labor costs). A lot of anti-union rhetoric seems to amount to complaining about not being able to have one's cake and eat it too.
2. Artifacts of law (either direct or indirect) that could solved through legal reform. My understanding is that at least some of the "adversarialness" of US unions derives from the requirements of US law, and German unions (for instance) operate very differently (e.g. https://en.wikipedia.org/wiki/Codetermination_in_Germany).
The problem is that, in the US, most peoples’ experiences with unions is with public unions, which are the worst kind of unions: https://www.bostonglobe.com/opinion/2019/10/29/coolidge-and-...
> For decades, that was the mainstream Democratic view, too. “The process of collective bargaining, as usually understood, cannot be transplanted into the public service,” President Franklin D. Roosevelt affirmed in 1937.