Pirelli boss Paul Hembery has revealed that the widespread criticism of its tyres during the 2013 season was hurtful.
Reigning Constructors' Championship winners Red Bull was particularly unimpressed by the Italian manufacturer during the year, labeling the rubber used as not hard enough.
Nevertheless, they dominated for the fourth consecutive season, winning the championship double with Sebastian Vettel and Mark Webber proving a class apart once again.
However, Hembury feels it was unbecoming of Red Bull to criticise their product during a year in which they were so dominant.
"That was clearly disappointing because everybody has the same challenge, and that is one thing that was true," Hembery said during an exclusive interview with Autosport.
"That then opened up what then became a battle between different teams of what we were allowed to do and what we weren't allowed to do, and we got caught up in that battle between teams.
"That was very disappointing as they had clearly dominated and won the championship so convincingly - that was really the opening up of a lot of comment and debate that really shouldn't happen.
"We are a partner and competitor, we always said if all the teams, or the sport itself, tells us to make a change we will do it, but being put under media pressure was very disappointing.
"Maybe sometimes we have been thinking that people have lost the reason of why we are doing certain things.
"That has been a little bit disappointing.
"If the sport does not protect you from it when you are asked to do something then you have to do it yourself."