They did not show any such thing. Kyle channeled all the power of Oa to Thanos which could destroy both universes and then defeated amped Thanos and drained Surfer's power from Parallax and defeated them both in a single page. Surfer proved he was better battery and that's it. Kyle showed to be a better energy manipulator than Silver Surfer.

Surfer can only dream about such a showing.

And Terrax downed Kyle with a cheapshot from behind which is not far fetched as Kyle did not have auto shields and even random mooks could stun him with a shot from behind.