When desktop support technicians resolve a ticket, they are usually required to document the cause and solution to the problem. Supervisors see these records, so you have to be professional, but can usually get away with using the acronym “PEBKAC” in situations where the user caused the initial problem. PEBKAC stands for “Problem Exists Between Keyboard and Chair.”
If you have a client who is unable to approve a proposed design without putting her stamp on it, just put an obvious error in the proposal: a logo that’s too large, a font that’s too small, or a few judiciously seeded typos. The client requests the change and feels she’s done her part—and your design, which was perfect all along, sails through to approval.