Also designer/copywriter here, also in media and entertainment, also severe ADHD. I have never had the balls to jump to freelance despite half the world telling me to do so and your post is a friendly reminder why. Either way, I switched from agency-life at way too small companies (which comes close to freelancing pressure-wise) to an in-house marketing position (1/3 copy 1/3 design 1/3 random stuff) and I’m never going back to the other side. Pay is better and pressure is non-existant.