This thread is mostly just full of fans who have no idea how a football club, or a business, is run.
A DOF isn't the boss of a manager at other clubs either. They work together on different areas of responsibility to make the club the best possible it can be.
The Manager handles the day to day work and improvement of the first team, while the DOF looks at more long-term development of the club as a whole, in tandem with the manager to help ensure that the long-term development will fit into what the manager will need for his day to day in a year or more, but thinking of the club first and not purely what the manager wants.
Now if there's a total clash between them, the DOF might raise concerns to the CEO who is likely to discuss it with the board. If they think the current results delivered by the manager is substandard, and looks unlikely to improve any time soon, with the added weight of the DOF's reasoning for why the long-term development strategy will continue to crash with the manager. Then the board is likely to fire the manager, and the DOF will present the CEO with candidates for manager that will work with the long-term plans. They will likely interview candidates together but the CEO makes the final call on who will be presented to the board for approval. (It's common in business to have a person you will work alongside with co-interview you with both your boss.)
As for complaints about too many scouts with similar sounding titles.
I don't even know for certain, but an educated guess from comparing rolenames in other businesses is:
Chief Scout - The direct report boss of all our scouts on payroll that goes out physically to watch games for players we are interested in.
Chief Technical Scout - The direct report boss of all our data analysts that spends time going through data from games, trainings and so on.
Head of Global Scouting - The person responsible for working with all the other scouting networks around the world that we collaborate with. We don't have scouts directly employed at all levels around the world, but this guy gets reports on players from youth level in South America or Siberian Tundra or whatever.
Then you have their boss who collates it all together, helping the departments on day to day what their needs are, and presents the findings to the DOF who discusses with the manager about possible players to buy.
Often the manager already has a shopping list of players he thinks will work in the team, and the DOF manages this down the scouting structure until reports are back up that can be discussed with the manager if the scouting team and DOF agrees with the manager that we should attempt to sign some of these players.
The manager's personal scout is for when Ole is extra interested in certain players, so Ole directs where he goes, and he reports to Ole for him to have extra talking points, but ultimately answers to the total scouting structure if we are to move on certain players.