Why no single Falklands air-defense system solved San Carlos

Which air-defense system was most responsible for Argentine aircraft losses around San Carlos?

There is no decisive winner: Sea Cat performed poorly, Sea Wolf was scarce, Sea Dart was ill-suited to the confined engagement, and manually aimed guns filled dangerous gaps.

San Carlos did not present the clean conditions assumed by any one missile system. Sea Cat was ineffective, Sea Wolf was available on too few ships, and Sea Dart could not exploit its normal strengths in the anchorage; sailors therefore fired general-purpose machine guns and light weapons at low-level attackers. The exchange explains why campaign outcomes cannot be credited to a single weapon's brochure performance.