But if i turn over to a union there is small assurance i will not take some pay cut. I doubt people making so much are top of bargaining priority list, probably more rank-and-files level are their focus. And then I have turned over my rights to majority, so it is suck up what my coworker wants or leave. It is similar for employer, i must suck up what it want or leave, but I already known these terms are okay with employer. Since i am not in majority bracket of workers this probably is not good.

This is not how unions work. (source: am union member)

Your claims and arguments are against some imagined shitty union-like thing that does not much resemble an actual union.