The Argentine Navy's old type 42 Santisima Trinidad was left moored quay side and neglected. Of course it leaked and then rolled over, we all saw the pictures, someone posted them up here.
During the '82 war the carrier '17th May' with its air wing of Skyhawks and Trackers played no part. Would be very unfair to say the Argentine Navy didn't want to throw its hand in. Look at the guts the air force pilots displayed, they were on a hiding-to-nothing but still climbed into those cockpits and took it up to the RN.
The carrier's officers and crew wanted to form a TG and attack the British fleet but were unable to do so and NOT because of what Conqueror did (that was later), but because of their appalling maintenance programme. One of the carrier's turbines failed and it couldn't be repaired in any sort of short time, it was a big job and, it had happened before. With only the one engine '17 May' could never achieve launch speed under conditions required for war. That's the main reason why the Argentine Navy played very little if no part in the '82 war, poor maintenance practice resulted in the flagship being a lame duck.
It costs a huge amount of money to keep a navy ongoing, and even very rich developed countries feel the budget pinch. Argentina would have to be (fairly) classed as part of "a third of the world under developed", hence, a Third World economy. I don't think it has any where near the money to operate safely highly complex machines that are unforgiving to their crews such as submarines.
Tragically this submarine's crew is long dead and they shouldn't have been permitted to go down to the sea in it.
: This article speculates the cause was a
: defective snorkel.