You are just wrong. Pvp is about damage and control, not healing. Healing done helps, but is never a deciding factor.
Pvp is not based on how you handle the healer only, it is based on full team management. (at least it was before this patch)
I feel like you are only talking about 2v2 here.. If you need to cap, just join the queue with another dps and end your games fast. You must be able to control/kill a healer with ease as 2 dps, so it's never an auto lose against a healer.