An important skill in coaching is the ability to stay focused on the thing you're looking to train, and to create the right situation to do so.
Telling another coach that you think what they're doing is wrong or could be done better tends not to go well. Here's a better way.
Are you familiar with the concept of big rocks as they relate to priorities? It's an important concept in your coaching. Knowing the rocks is a key skill.
Access to more and/or better resources is a definite competitive advantage in that they can give you an edge in one or more of the other success factors.
Admin work doesn't get a lot of attention in coaching. If you get it wrong, though, it can have a big impact on your success.
The management of the competition phase probably isn't the biggest driver coaching success, but it definitely matters - especially when margins are narrow.
Your relationship with your players - both individually and collectively - can be a massive influence on your success as a coach.
If your training sessions produce better results than the competitions' - even if only by just a little each time - your chances of success go up.