Some of this was a little off. Yeah stark built the self destruct on hulks ship, but it was someone from skar that caused it. And Peter didnt want to expose his identity, and stark literally threatens to put his family on the street.
With Hal Jordan the parasite couldn’t fully claim him but it made him insanely paranoid. He was going to quickly and painlessly TWO SHOT KILL ALL OF DC (which he did) then remake creation with himself as god. In his mind he was going to control every aspect of existence to completely prevent pain and suffering. In his mind he was saving everyone. He couldn’t understand why heroes were resisting him. Actually a really cool character, he still exists! Probably THE strongest DC villain that currently active tbh (he came from the previous existence of DC so we have 2 Hals) BUT he’s not fully a villain. Hes just crazy paranoid. He’s currently going around slaughtering Sinestro’s Yellow Lanterns because he can’t comprehend they’re anti-heroes now.