What did Childe mean by that? (4.2 AQ)

Childe chuckles mockingly and does a thumbs-down before running out of strength and collapsing into the portal.
Is it because Neuvillette took him down from behind in the last battle, which he considers dishonorable?
Or is it because Neuvillette almost failed to protect the civilians that the Narwhal was about to eat?

https://preview.redd.it/pe9ywrw0h5zb1.jpg?width=1946&format=pjpg&auto=webp&s=a2f559ecca5faaa7705dc3485251291049c51924

https://preview.redd.it/zh5d7rw0h5zb1.jpg?width=2048&format=pjpg&auto=webp&s=8892b267867c9aec43e696621f7803426af525a7

https://preview.redd.it/2rxi5rw0h5zb1.jpg?width=680&format=pjpg&auto=webp&s=2cafc8058f2c25b7bc73981a48ea0e4147e5ad90

https://preview.redd.it/c8rkkiw0h5zb1.jpg?width=1791&format=pjpg&auto=webp&s=4b986857db6958dfed0c4a3233321974a93c30e0