Mkhitaryan moved to Old Trafford from Borussia Dortmund last summer in a £27million deal last summer.
The Armenian midfielder initially struggled to make an impact at Manchester United.
Henrikh Mkhitaryan has revealed why he really joined Manchester United
But he has become a key member of Jose Mourinho's first XI in recent months, and scored in the 3-0 victory over Leicester last Sunday.
After joining United he was labelled as a money grabber by some Dortmund fans, but he has now hit back.
"I can not understand that, and that’s wrong," Mkhitaryan told German outlet Bild.
Manchester United player ratings against Leicester
Sun, February 5, 2017
Express Sport brings you Manchester United's player ratings from their clash with Leicester City
1 of 11
David De Gea – 7
Borussia Dortmund fans were angry when Henrikh Mkhitaryan left for Manchester United
Get Quotes on Home Insurance
"If it were just about money, I would have transferred from Shakhtar Donetsk to Anzhi Makhachkala and not to Borussia Dortmund.
"But I did not want that.
"I wanted to develop further."