No, no... no massacre coming, people. As with the Goto and Kyoko situation(s), the perpetrator ends up being recognized as a victim in their own right, just one that, like them, turned to victimizing others instead of admitting their problems.
Didn't stop me from wanting to give the little shit a rearrangement of their smug face for awhile.
Also, we had hints of this storm coming previously- Akari noticed Hinata was off the other night, and we saw her despondent in the tub. This situation lasts for a good while, too, if I recall. It was several episodes in the anime, anyway. It takes even longer to get to the root of the problem with the perpetrator, but at least the bullying stops about halfway through the second season. There's a full volume between now and when it stops. Closer to a volume and a half, in fact.