People don't realize that you're allowed to tell LLMs/agents "no." In the real world, it's a professional faux pas to question the design of a creative coworker when you may not know design better, but LLMs/agents are not your coworkers.

Don't like abuse of serif fonts? "NEVER use serif fonts."

Don't like the gaudy color palettes? "Use this color palette with a white-dominant background"

Don't like the marketing fluff? "Remove all non-salient text from this app."

You're encouraged to be picky.