The national labor relations board is an agency that can be effective in handling disputes between the company and the union, however, they can be non receptive to complaints from members against locals.
For the most part, they will advise against taking any action and will refer you back to the union process for remedies. If you want to complain about FTR, you better have more than "my union doesnt like me".
That will guarantee you this response from the NLRB...... YOU---> " my local doesnt like me" NLRB--->" we'd love to help you out, what door did you come in?""
Peace.