There is some kind of Bella Guttman-style curse on have on this competitionInteresting that Porto have never won the Taca de Liga.
As other people said the big 3 generally don't use their main players, even in the final many times 1 or 2 of the best players are rested.
Still, by this time we should have won it sometime.
It's just that every time a cosmic event just happens that prevents us from winning it.
We've played well and lost, played bad and lost, we had 3 years in a row that we couldn't get out of the group stage and didn't have a single victory in the competition for 3 years, we've lost in penalties, last minute goals and even lost unexpectedly as the rules said goal average was the second or third factor to advance in the group stage when actually us and even the league itself thought it was meant to be goal difference (yes, even the league was not aware of the wording of their own competition , it was only brought up because the other team realised that after the game).