[Wilduck]

I don't think you understood his points.

When he talks about the "kingdom of nouns" he's not complaining that the problem with "Manager" classes is that they're hard to name. Instead, the argument is that these manager classes are hard to name because you've reached a point in encapsulation where the association between behavior and state in inherently unclear and overly abstracted.

I think the author would agree that all programing deals with the difficult problem of composition, however, the argument in this case is that OOP introduces unrealistic constraints on composition. The argument in this video is that encapsulation and the single responsibility principle requires you to choose between a difficult to maintain tree-based object hierarchy, or to abandon encapsulation, and that both of these are sub-optimal choices.

Finally, I think the author would agree that he "has not learned how to use OOP appropriately" but would go one step further and say that "it's impossible to 'use OOP appropriately.'"