Everything you’ve mentioned helps no doubt but the best environmental in the world doesn’t help if your players are no good, talent trumps all.The early picks need to come into a healthy club culture, and not be made too much of a fuss of early days. Arrogance can destroy a young talents attitude, to learn and grow, and things can go off rails.
Equally draftees can learn losing ways, in a poor club culture situation.
So kids need to come into a healthy focused club, striving to be successful in the right ways, with excellent assistant coaches and mentors. IMO.
Nice people, does not mean excellent teachers, but it helps.
Worldly people helps, and knowing how to impart their knowledge.