Complex sentence: Throughout the books, it is generally depicted as either corrupt, incompetent or both, its high officials blind to actual events and dangers in the wizarding world, reaching a nadir of corruption before being effectively taken over by Lord Voldemort.
Split into simpler sentences: Throughout the books, it is generally depicted as either corrupt, incompetent, or both, with its high officials blind to actual events and dangers. It reaches a nadir of corruption before being effectively taken over by Lord Voldemort.