Originally Posted by Spartangold
We weren't, early to mid game she racked up a total score of 0-7. It was into late game where we started to push towers and winning teamfights that the radiance was bought eventually at 45min mark.
Will QOP be a good counter?
If that's the case, then it's your own carries that are failing. Without a replay, I'd probably guess that you had a team of all gankers/pushers and just didn't have a hard enough carry to beat Naga once the game got that late.
It doesn't matter how much you gank a lategame hero, if you leave it long enough they're eventually going to get some farm and become effective. So either end the game earlier or grab Medusa or a carry with cleave/bfury to deal with her. If she's that far behind (and getting a 45 minute radiance, which is fucking nothing) then there's no way you should be losing to her.