Matsatsantsa emerged 4-1 victors over the Buccaneers and lifted the trophy at the Moses Mabhida Stadium on Saturday night.
Supersport flew out of the blocks and showed their intention from the onset with Pirates lucky to escape down the tunnel for half-time only a single goal behind.
Bucs collapsed under the pressure of their opponents in the second-half and were particularly indebted to Siyabonga Mpontshane for keeping the scoreline within the bounds of respectability.
Jonevret, who always faced an uphill battle in uplifting a dressing room left visible damaged after conceding half a dozen to SuperSport in November last year, said his side were second best on Saturday.
"Of course I would prefer to be someone else right now and I don't want to say it was nightmare but it was a tough day for us," Jonevret said after the game.
"It [the final] was arranged very well with fantastic support and the atmosphere at the arena before the game; everything was there for a night to remember.
"Unfortunately we look a little bit stressed. I think we lost too many balls, very simple. Okay, they [Supersport] don't create too many chances but I think they had eight or nine corners in the first half and we know that SuperSport is good on set pieces so that is not good of course.
"They got some momentum and they got some energy when they were pressing us back and we gave the ball away too quick. We lost the balls pretty stupidly in front of the goal but we also had two or three chances. When it was 1-0 at half-time we said 'we can change this' because the players really wanted to have something good there at the end of the season.
"But it was bad, ugly... 4-1. It could have been more there for us."