Although the pressure on current manager Louis Van Gaal has eased after United ended a run of eight games without a win by beating Swansea at the weekend, supporters used to the cavalier style of the Sir Alex Ferguson era have grown frustrated by his more cautious approach.
Just 16 league goals have been scored at Old Trafford by United and their opponents this season - the lowest at all 92 Football League grounds - while Van Gaal's side have been held to six goalless draws at home.
And although adidas are already reaping the rewards of their new 10-year deal with United, company chief Hainer appeared to agree with that opinion in an interview with a German newspaper.
"Business with Man United is going very well," he told Suddeutsche Zeitung. "We sell more jerseys than expected, the foreign share is 60 percent.
"We are satisfied, even if the actual way of playing of Man Utd is not exactly what we want to see."
Van Gaal has worked hard to impose his philosophy on United since taking over as manager 18 months ago, but it has often seemed at odds with the club's attacking principles.
Chants of 'attack, attack, attack' have been heard on a number of occasions from United fans this season, although their team were more positive in the goalless draw with Chelsea and again in the second half of Sunday's 2-1 win over Swansea.
UNITED'S 2015-16 EPL STATS SO FAR
Played: 20
Won: 9
Drawn: 6
Lost: 5
Goals for: 24
Goals against: 17
- staff reporter and Daily Mail