How to pass ATPL as an ATC?
Being an Air Traffic Controller does not provide any legal shortcuts for piloting courses, in any jurisdiction as far as I am aware. Sure, you could probably sleep through the lectures on meteorology and maybe parts of others, but you still need to sit and pass all 14 exams. You would have little to no advantage on the subjects of aerodynamics, aircraft systems, performance and loading, and human factors.
You also need to complete the practical flight training and meet the same requirements as everyone else.