What should I do if a client keeps changing the brand marketing proposal?

The most exhausting part of creative marketing isn't coming up with ideas; it's the lack of alignment within the client's team. Today the boss says they want a premium feel, tomorrow sales says they want it to be more direct, and the day after someone adds, "Can it be more youthful?" The more the proposal is revised, the more it looks like a patchwork. I now condense the main message into a…