Wolves secured just their third point of the campaign and snapped a 12-game losing streak as Ladislav Krejci's header cancelled out Joshua Zirkzee's deflected opener in a 1-1 draw at Old Trafford. United were missing captain Bruno Fernandes, Mason Mount and Kobbie Mainoo through injury, while Bryan Mbeumo and Amad Diallo are absent due to the Africa Cup of Nations.
"We have a lack of fluidity and then lack of quality and then lack of creation of chances, and then we suffer a goal from a set-piece," said Amorim. "These details are important to win these games."
But they could have been well on course for a return to European football's top table next season had they not failed to win four of their last five home games. Amorim, though, remains confident his side will end the season strongly once they have their key players back fit and available.