You forgot that these days we also have the Type 45, yes it lacks in ASW but in area denial for AA defence there is no better ship. I do wish we still had some strategic bombers like the Vulcans.The whole scenario is preposterous as the RAF can reinforce the Falklands with more Typhoons in just 12 hours.
There are 3 early warning radar stations on the Islands and a RN SSN is thought to always be not too far off from the region at all times, and so the Argentines would have to be suicidal to risk any of their major surface ships to attack the Falklands.
Rapier SAMs protect the airbase at Mount Pleasant and a new more capable system will come online in the next few years.
Add to this 600 or so heavily armed troops waiting for the Argentines and so the chances of any "surprise" invasion succeeding are around a big fat zero.
I have seen a lot of such articles/threads on Quora, started by fan boys and trolls. They don't realise that UK has gone forward and matured its technologies while Argentina has regressed.
They also forget that the first "war" is classed as a small conflict in UK militarily. If they were to try that again and sitting PM is a bit more adventurous Argentina military installations will become a charred extremely well-done steak in no time.