Has a Copa America game ever ended 11-0?
It has. 11-0 has been a Copa America final 2 times in 1,738 games. The first was Argentina beat Venezuela on August 10, 1975; the latest was Argentina beat Venezuela on August 10, 1975.
That makes 11-0 the 26th most common final score out of 36 that have ever occurred in Copa America. One point away, 12-0 has happened 2 times and 11-1 has happened never.