I don't know much about South American soccer leagues but I remember one of the league (I forgot if it is Columbia or Peru), there are very little goals scored.
I prefer watching European leagues as there are more goals in these leagues.
Yes, Colombia has less goals normally but you can see a lot of goals in Brasil 1st and 2nd leagues.
South America has better games than Mid (Peru, Bolivia, Colombia, Ecuador, Uruguay...) You can follow Argentina, Chile and Brasil leagues.