Unions ruined my previous workplace. We used to get bonuses depending on performance. I'm on a 6 figure job and I'd get an extra $30-$40k per year with the bonus, which was great.

Then the union movement started at work, employees voted to unionize and the unions negotiated with management for some crappy % salary increase, year on year but in return bonuses were removed and it also reduced promotions.

I ended up leaving because I was making less than I was pre-unionization. Idiots who were bad employees couldn't get fired because the union protected them and they kept getting shifted from team to team because no manager wanted them on their team. People would magically start taking sick days on very important days in our year when we needed the most people at work, again management couldn't touch them because they were protected. Productive workers like me were given more and more work because the bad employees did less and less, so I was having to pick up the additional work, which would have been fine with me, except bonuses had been removed and promotions were gone. So there was no point for me to put in the effort I used to and I'd be better off slacking off like the rest of the idiots, put in minimal effort and just take that 3% pay rise year on year.

Unionizing just totally ruined the culture of the workplace. It turned into a shithole daycare centre for adults rather than a productive workplace.