Be stimulated by rejection
I've never had a problem with a dumb client. There is no such thing as a bad client. Part of our job is to do good work and get the client to accept it.
No matter how many times your amazing, absolutely brilliant work is rejected by the client, for whatever dopey, arbitrary reason, there is often another amazing, absolutely brilliant solution possible. Sometimes it's even better.
Once you have the statement, it will design itself.
Forget all the rules you ever learned about graphic design.
When you have something truthful to say, it will design itself.
Counter the effects of culture (steering your design ideas) by going out and looking for new experiences.