NaVI have been underperforming for a long time now. Despite having players such as Simple, Guardian in their roster the NaVi lineup is anything but a top level team right now. The NaVi lineup has been on the verge of disbanding right now and has been thinking along those lines for quite sometime now.
The past six months , NaVi have been on the thoughts of disbanding, but someone would come up with an excuse and keep the team together. However their loss at the major definitely seems to be the ultimate straw and they should be going separate ways soon.