I was writing about the Falklands earlier and considered afterwards some ways the fighting could have gone more different, especially making the war more destructive and costly.
Some ideas occurred to me.
HMS Splendid sinks the carrier 25 de Mayo.
An Exocet hits HMS Ark Royal or maybe HMS Invincible.
Operation Mikado goes ahead.
Better-trained Argentinean troops are deployed into the Falklands to fight there.
Canberra, laden with troops, gets bombed while in San Carlos Water.
Any other ideas? No, not nuclear weapons because that is just silly.