DEAR MISS MANNERS: As a teenager in her first job, I have a good workplace, for the most part. The manager is friendly, and the co-workers are amusing and cooperative. Except one. She is the kind of person who always has SOMETHING wrong: her finger (cut while she was under the influence), her hand (scraped by an approaching car), her hip (nerve pain, which the manager also has), etc. Her complaints sometimes differ, but they all have one thing in common — making others pick up her slack. One employee demanded she never get scheduled on the same shift with her. People trade pained smiles when …