Zz'Rot Portal Needs Nerf

This is probably single handedly the most frustrating item ever. It needs a WAY longer cooldown and needs to be limited to only two on the map per team. The item also takes way too many hits to kill. It wouldn't matter that the cooldown is low or if many players put it on the map, but the thing takes A LOT of hits just to kill. Please give it a REALLY big nerf in some department . . . one of the three I mention above . . . Longer cooldown, only allowed to have two per team on the map, or make it easier to get rid of with hits. I just went into a game where the JG, support, and top lane all bought Zz'Rot Portal and was able to push one lane all the way down. It is ridiculous.