bruh, i worked in 1 of those union shops when i was a safeway employee in high school
the union is a fking criminal god damned scam worse than amazon itself
they coerce workers into joining (at my store it was by flat out lying to people, telling them that they had to join to keep the job), collect dues from them (which invariably leaves the entry level minimum wage workers w/ less-than-minimum-wage income) for a year before allowing them any union benefits or protections and consistently fail to respond to member complaints about management violation of labor laws and/or labor agreements with the union
it's straight up mafioso protection racket horseshit
it takes a lot to be worse for workers than an employer like amazon or walmart, and the union is indeed worse -- more insidious, more malicious, more devoid of conscience -- than those employers