Thank you for the information. Unfortunately, although you say your union is useless, you are bound by the processes set out in the bargaining agreement for grieving any actions that arguably violate the BA. In other words, you have no choice but to use the grievance procedures set out in the BA to handle any general personal issues and work issues. if your union refuses to represent you, then you can file a complaint with the NLRB and might want to consult with a labor attorney to file suit against your union.
The only circumstance that allows you to go around the union and grievance process to some extent is if you have evidence that you are being targeted for adverse employment decisions merely because of your gender, race, national origin, age (over 40), disability, religion, pregnancy, or military service. If that is the case, then you would have a claim you could file with the EEOC. Otherwise, they would have no jurisdiction over this issue and you would have to use your BA grievance procedures. Certainly, you can always use the chain of command to try to resolve the issue, but if that doesn't work, you must go by the process I mentioned. If you were not in a union, you wouldn't even have the grievance process available to you, so you at least have that process available here.
Please feel free to ask for clarification if needed. If none is needed, then if you could take a moment to leave a positive rating in the box above, I will receive credit for assisting you today. Thank you.