>>126114710It's a war that was affecting everyone and Earth was going to be destroyed next by the Annihilation wave. Still no one involved Earth until the wave went for it and at that point the United Front had dissolved and no one in the Galactic Community was going to save or warn Earth but Nova.
Nova sent distress signals to warn Earth that got ignored by the heroes. In the end Nova has to go directly to fight Annihilus and risk himself to save them.
But his frustration in that page has more to do with the fact that Tony didn't really give a shit that they were about die and cared more about having Nova be on Earth as a registered superhero because he saw that he got more powerful.