Very much not the ownership class here - I'm solidly in the worker class. Unions prevent you from negotiating your own terms, keep talented people from raising to new levels, and prevent the removal of people who should have been fired long ago.
"Negotiating on your own terms" is definitely a wild thing to see as a positive. You may believe you have some special bargaining power as an individual but as proven by history and some basic power analysis your ability to better your position in life is absolutely more effective through a union. "Negotiating on your own terms" is fine if all the bosses find your personality pleasant and your sociocultural backgroun…
https://www.supremecourt.gov/opinions/17pdf/16-1466_2b3j.pdf
Are you sure you've thought about this more than GP and are you absolutely certain you're smarter than everyone involved in this supreme court decision? If not, I would think of adding some nuance to my ideas if I were you.