How come OOP was supposed to be the best way to code and now we need dependency injection to make it practical? Does that mean that before DI, OOP was never bei

How come OOP was supposed to be the best way to code and now we need dependency injection to make it practical? Does that mean that before DI, OOP was never being done properly? It was a bad idea all along and everybody thought it was just their poor OO skill that made them unable to design programs that met all the requirements?