It was precisely because the Chitauri corpses and technology had wasted so much time that the Avengers had been forced, even after the great battle, to keep devoting their energy to managing these matters.
After all, if the Avengers really had not stepped in, no one knew how chaotic the battlefield ruins of the Battle of New York would have become. Unfortunately, the Avengers were not a normal official organization in the end, and they honestly had far too few members.
During battle, robots and mechs might have been able to make up for their lack of manpower, preventing the Avengers from suffering too much due to numbers. But when it came to handling all kinds of affairs, the Avengers' disadvantage in manpower was truly far too obvious.
After all, the Avengers were not like other official organizations. They had far too many secrets, and could not recruit or train large numbers of members to work for them. Even now, when Tony Stark had slightly lowered his standards and allowed Reed Richards and the others to join the Avengers, Reed Richards was a top genius skilled in scientific research, not a talent suited to handling all sorts of trivial matters.
And with the Avengers somewhat short-handed, the follow-up matters from the Battle of New York dragged on for a very long time. At the very least, Robet had not been able to tell all the Avengers everything right after the battle ended.
However, through Jarvis, the Avengers quickly learned how serious the whole matter was. Especially after Martian Manhunter read Cull Obsidian's memories, the Avengers gained even more intelligence about Thanos.
Now the Avengers already knew that Thanos himself was a powerful being. In Cull Obsidian's memories, Thanos's strength might not be weaker than the current Robet's. But that was