From what I can tell, the union pleas are being ignored. That doesn't make a toxic workplace. It's unfortunate, but it's not toxic.
My management ignored my pleas not to litter iframes all over the app and scrape shitloads of client data, but I don't consider that treatment as "toxic". I also didn't get a raise this year and my pleas were met with "everybody didn't get a raise, that's just the way this year went".
So I'm really struggling to see how making pleas to your management = toxicity. What kind of bullshit victimization is that?