Honestly, this resonates so much. I've been down the freelance road for paid social creative - copy, visuals, even some video editing - and while you do find the occasional gem, it's never scalable. The unicorns exist, sure, but most agencies end up playing talent roulette every month. Consistency goes out the window the minute someone gets a better offer or decides they're bored of your briefs.
The internal team point is huge. I know it's expensive, but when your designers and copywriters have skin in the game - benefits, growth, actual ownership of the brand's performance - the quality jumps. They start caring about the long-term reputation, not just finishing the task and cashing the invoice.
We run a similar system on our side for ad creative. Onboarding is everything - we capture the founder's tone, their customer's pain points, their visual style. Then we build a custom creative brief that's half AI-assisted, half human intuition. The AI helps us scale drafting and generate variations, but the final cut always goes through a human eye. Taste, tone, strategic positioning - you can't automate that.
The bit about standards living in your head instead of a repeatable system? That's the real kicker. If your SOPs are vague or your feedback loops are loose, you'll keep getting inconsistent work from contractors because they don't know what "good" looks like in your world. invest in the system, and suddenly you stop blaming the talent and start fixing the process.