3 months.
That's how long it took Max to completely get the destructive aura leaking from his body under control.
With a resilient mind and an unyielding will, Max managed to slowly discern the desires that were placed in his mind by the seed of destruction from the voice of his own consciousness.
Becoming immune to the seed's trickery, slowly but surely Max managed to get his mindset return back to normal as he was not overwhelmed with the constant desire to destroy things and beings around him.
However, while his mindset had stabilised it was a very narrow stabilisation and if anything major affected his emotional state then he could very easily be consumed by the seed's corruptive thoughts again.
He was in a weird position where he had managed to balance the forces wrestling for control in his brain, however, any slight change in this dynamic could very easily make it unbalanced again.