Express FC had their dream of making the CAF Champions League group stages crushed after a 1-0 loss to Al Merriek of Sudan.
The Red Eagles carried a 2-1 lead to Sudan but failed to hold on to ensure progress to the next stage as Merrik went through on away goals rule.
The UPL champions had their game postponed from Friday to Sunday.
"We are out of the champions league but I think the boys have done well," Bbosa said after the game.
"They have given their all under the circumstances because there was a lot of disorganization," he added.
"The game was moved from Friday to Sunday, the officiating was also lacking but on our side, this won't kill our motivation,"
Bbosa and his charges must now turn their attention to local football with the Uganda Cup semi-finals set for this week.
Express face BUL on Thursday and will hope to use their experience to their advantage.
"Now we have to concentrate on the Uganda Cup and the league. Most of our players were playing on the continent for the first time,"
Express already have the league title, CECAFA Kagame Cup and will now be looking to add the delayed Uganda Cup.