Mourinho refused to hold back after the match, telling Sky Sports News: "We were masters in complication. Everything was complicated. Players didn't want to or didn't play simple. Everything was slow. Everyone was one more touch, one more trick, one more flick, one more turn.
"I don't think we deserved to lose, but we gave them the opportunity to win the match by being solid in defence and sniffing a chance in attack."
Defeat for United handed the Premier League title to rivals Manchester City - their third in seven seasons.