Dortmund endured a miserable Champions League campaign and they claimed the unwanted record of becoming the first team in the tournament's history to secure a third-place finish on only two points after losing four and drawing two games.
Tottenham Hotspur clinched top spot in Group H, followed closely behind by Real Madrid, and BVB will have to settle with challenging for Europa League glory after dropping down in the last-32 stage of the competition.
Bosz, who is hoping to see better from his team when more injured players return, admits his side didn't deserve to go any further in Europe's top event but he is still hopeful of winning European silverware this season.
"Obviously, we wanted to remain in the Champions League after the turn of the year, but I have to say that we are deservedly not in this competition anymore," he said. "Now we have to do everything to reach as far as possible in the Europa League."