I've discovered this test a long time ago and it also came out as an INTJ. The crazy thing really is how accurate the description is when reading it. Knowing my personality type didn't help one bit the 'solve the flaws though'.
It is one of the rarest types and I have noticed that talking to other INTJs in real life or online tends is like day and night and feels so much more relatable compared to talking to 'normies'.
Good luck with the new discovery!