Original sentence: Brazilians complain that especially in the early years the referees were often biased against the Brazilian teams, and that other teams abuse of violence.It is remarkable that Argentina and Uruguay are so superior to Brazil in Olympic and regional competitions such as the Copa América and the Copa Libertadores, while they are clearly surpassed in the main national teams event, the FIFA World Cup
Edited sentence: Another complaint usually made by Brazilians is regarding the abuse of violence in this competition (this being the chief reason why Brazilian clubs shunned the competition in the 1970s).Brazilians complain that especially in the early years the referees were often biased against the Brazilian teams and the rules were often obscure or unfair.However, the most remarkable example of violence against a Brazilian team, in which (Atlético-MG) players and coach were spanked by angry Rosario Central supporters after the local team lost the match happened much later (1995) and in the Conmebol Cup, not the Libertadores.It is really remarkable that Argentina and Uruguay are so superior to Brazil in Olympic and regional competitions such as the Copa América and the Copa Libertadores, while they are clearly surpassed in the most important event, the FIFA World Cup.Most Libertadores playoffs in the 1960s would have had different results using European rules (Palmeiras, for instance, would have won in 1973