Why did they drift apart?

With SK and D na we know that SK was being more independent and getting more success after working with him in which he got jealous.

But I wonder what made Anirudh and dhanush not work with each other anymore.

With SK and D na we know that SK was being more independent and getting more success after working with him in which he got jealous.

But I wonder what made Anirudh and dhanush not work with each other anymore.