So, here's the deal. You take big agency experience and cut out the big agency overhead. Replace the "My job is keeping my job" people with "I work for me, and I'm an effen demanding boss" people. Recruit creative self-starters who consider most marketing messages an annoyance, and endeavor to make sure they’re not. Hire from the planet, not the neighborhood. Unchain everyone from company desks and donate the time clock and factory whistle to the Smithsonian. (Since 2012, not since COVID.) Limit the agency to three clients at a time so the top dogs always get to work directly on client business (because they want to) and not administrative business. Eliminate the new business function. Devote all energy to current clients, not possible clients. Then ride it like you stole it.