This is probably not your intention, as you specifically say you're not looking for cowboys, but that is contradicted by the rest of the description. You say you want self-managing engineers who just do whatever they feel like.

You can't possibly just have zero structure, process, or accountability for engineers. It sounds like pure chaos and definitely not the kind of place I'd ever want to work at. How do you evaluate an engineer's performance if you have no expectations of them to track against?

You're likely just trying way too hard. It's like someone else said that your job ad reads like a check list of Reddit gripes and you've simply over-corrected.