He says he can understand their feelings but has become accustomed to criticism and is working as hard as he can to get the Blues back on track.
"I cannot change the perception people have of me because I was successful at Liverpool against Chelsea," Benitez told the Daily Mirror. "I thought when I came that if I carried on winning games here, it would get easier.
"But if you cannot win all the time, I understand that sometimes the fans get a little bit frustrated. And I am frustrated too.
"But at any club, whatever its circumstances, there are always going to be people who do not agree with you.
"In football in England, you have 60million managers. In Spain, there are 40million managers. Everyone has an opinion. You have to accept that this is normal."