The versatile attacker is hopeful that the criticism in the wake of Bayern's surprise-loss against Arsenal will spur them on again in the remainder of the season
The Bundesliga leaders appeared to have all but secured qualification for the quarter-finals after their 3-1 win in the first leg, but eventually only just scraped through on the away-goals rule.
"It feels pretty stupid. We all knew that we would still qualify if we lost 2-0, but we never even thought that was possible, perhaps that's where it all went wrong," Muller told Eurosport.
"It's a good thing, though, that we have now endured a setback and are no longer living on cloud nine.
"This could another period where people approach us very critical. Both internally and in the press. That might help us get back to our usual best again."
Bayern will be looking to return to winning ways on Saturday when they travel to Bayer Leverkusen.