Thor couldn't refute Rocket's ridicule at all.
But after thinking about it carefully, he realized that after the incident with the Dark Elves a few years ago, he had been searching the Nine Realms for a way to stop Ragnarok, and had never come to Earth again.
It was impossible to contact him. Even Dr. Jane had fallen out with him over it and refused to see him.
Thor was a prideful Asgardian man; it was impossible for him to plead with Dr. Jane, so he chose to not think about Earth as much as possible.
After that, he and Loki came to Earth to look for their father.
Before meeting Dr. Strange, he only had time to talk to Knight about the Infinity Stone.
A few minutes after meeting the sorcerer, he was sent away again. Then, he was dumped on Planet Sakaar.
After that, he had to return to Asgard to fight and save the civilians.
After barely beating back Hela, Loki revived Surtur.
