The amateur sport moved to a computerized scoring system after Jones' infamous loss at the Seoul Olympics in 1988, when three judges awarded a decision to South Korea's Park Hi-sun after Jones dominated their fight.
"I don't blame any (scoring) systems," Abdullah said. "I blame the people that operate them. I'm disappointed in some of the things I'm seeing."
Spence knew the feeling after three rounds of trying to break through the passive guard of Vikas, who fights a rigid amateur style emphasizing defense and tactical aggression. India's amateur boxing scene has surged in popularity in the four years since Vijender Singh won his nation's first Olympic medal in Beijing, with thousands of prospective Olympians training in the amateur style with no intention of ever turning pro.
"I thought I won the fight," said Spence, a talented puncher who intends to turn pro this fall, along with most of his teammates. "I thought I threw more punches and landed more shots. I thought I was the more aggressive boxer. It was kind of frustrating, but he's fighting to the computer system."
Warren's loss was particularly heartbreaking. The undersized dynamo nicknamed "Nuke" twice passed on a pro career and a chance to provide financially for his growing family to take another shot at hanging a gold medal around the neck of his mother, Paulette.
He waited well over a decade for this moment, climbing the amateur ranks in his native Cincinnati and avoiding the pitfalls that put two of his three brothers in prison. He got to the top of the amateur sport — and then stumbled at the three biggest moments of his career.
Warren wept in Beijing when he lost his opening bout on a last-minute tactical error. Four years and another one-point loss later, he seemed dulled to the pain of going winless in his unmatched Olympic career.
And he won't be back for Rio: Warren said he'll turn pro, probably along with every member of his team.
"It ain't really no setback for me," Warren said. "I've got big things coming up. This isn't the end for Rau'shee Warren."
Oubaali rallied from a first-round deficit with more aggression and precision than the third-seeded Warren, a former world champion. Warren also lost his contact lenses in the opening round and couldn't size up Oubaali, who mostly controlled the final two rounds.
Warren still thought he might have eked out the decision, but few fans at ExCel seemed surprised when Oubaali got the decision. Abdullah also said he agreed with the decision.
Now 25, Warren says he's still happy he stuck around to become the first three-time U.S. Olympic boxer — even though he might still turn out to be the biggest disappointment on the least successful American team ever.
"It's always a good experience," he said, "to do something people don't normally do."