Unfortunately, it's an all-or-nothing deal. The NLRA is a very rigid law, and once a union has been sanctioned as the exclusive representative of a bargaining unit, they have the authority to do that.

It's next to impossible to either decertify or deauthorize a union once it forms, so you not only have to trust the current leadership, but all future leadership that may get elected, to focus only on the things you list and not focus on negotiating your compensation for you.