So, this morning after I was put on route A, a senior driver came in and decided to bump me so he would work and I would be off. I told him I really wasn't trying to go home, but he didn't seem to care. Bringing the situation to my boss, his response was that since he is cover as well, he could bump me. Now, I know exactly how bumping and seniority work, but my issue here is that he is NOT a cover driver. This driver HAS a bid route but he has never been trained on it. I spoke to my steward and was told I could request my guaranteed 8, which I knew, but at that point I was already heated. If this driver is not being put on his bid route, is there anything I can grieve or not, since I decided to go home?