The second leg of the final was marred by unsavoury scenes when Boca’s bus was attacked by River fans on the way to the Monumental.
River supporters hurdled objects at the vehicle’s windows, which quickly shattered, before police used tear gas to disperse the crowd.
The gas filtered on to the bus and left several players feeling unwell.
The South American Football Association wanted the game to go ahead but the match was eventually postponed until Sunday night, a decision Angelic has agreed with.
“It was supposed to be a party, a sad day for me,” Angelici told Fox. “Some River outcasts attacked our bus.
“We were in no condition to play this final.
“I want to thank CONMEBOL and River. We said that we did not want to play with injured players. I think the decision is correct.
“We need to be ashamed of this as a society. The world was waiting for this match. I think the final has to be played under equal terms.
“We saw that some players were without air in the bus, had to help them quickly.
“I need to acknowledge the River authorities for their concern. CONMEBOL resolved that the match was going to be played, but I saw we had two players in hospital.
“Five or six outcasts ruined the party for 60,000 present inside the stadium.”
Angelic’s comments came shortly after Boca captain Carlos Tevez hit out at CONMEBOL and claimed his side would have been kicked out of the tournament if their fans had acted the same way as their River Place counterparts.
“Of course this game was almost doomed and River was close to getting the cup, because they do what they want,” the former Manchester City man said. “At this time, River did whatever they wanted to, so let’s talk about anything else.”
He added: “If this was Boca, we would be out already and River would get the cup.”
CONMEBOL’s initial decision to press on with the game annoyed Tevez, who said: “I think this is a shame.
“What CONMEBOL is doing is a shame. I say this personally. If someone wants to take action against me for it, do it, I accept it.”