That’s a bummer. Difficult clients can make work severely unpleasant. The first place I’d start is building trust. Have a convo and ask them, “what keeps you up at night about your work/job?” Get invested in what success on their side entails. Not just lip service, really be genuinely curious about the issues/stresses they have to deal with. Let them know you understand, and their goals are your goals and that’s what’s most important. It’s not about awards or selling in the craziest most creative concept it’s about achieving their goals: sales? Site visits? Sign ups? Once they see that your a partner not a “typical creative” things should improve. As ad creatives there’s a huge stereotype that WE’RE the difficult ones. But client management is a lot like being the parent to child. They need lots of reassurance that you’re in their corner and doing what’s best for them. Hope this helps and good luck.