Schumacher not taking criticisms seriously
His former teammate Martin Brundle had said the seven time world champion drove "appallingly badly" in Montreal, while fellow BBC commentators Eddie Jordan and David Coulthard also criticized Schumacher.
"I don't take them seriously because there are different elements to formula one, and one part is show business," the 41-year-old is quoted by PA Sport in Valencia, a street circuit on which he has never raced.
Schumacher said he is "quite happy" with his return to F1 so far, and Mercedes team chief executive Nick Fry said he is doing "an excellent job despite what I understand has been said about Michael".
"All in all," argued Schumacher, "I don't think there are many guys around the world who, at 41, come back after a three year break and compete at this high a level."