Barcelona sits ninth in LaLiga after a 2-1 loss to Real Madrid on Monday (AEDT), Koeman becoming just the second coach to suffer defeat in his first three Clasico meetings.
The Blaugrana also made it five wins without a LaLiga Clasico victory, their longest winless run against any team in the Spanish top flight since May 2008.
After the game at Camp Nou at the weekend, under-fire Barca boss Koeman had his car mobbed by a crowd of fans as he attempted to depart the stadium.
The Catalan club released a statement to condemn those actions and Koeman suggested the incident reflected wider problems as he prepares to face Rayo Vallecano on Thursday (AEDT).
"I don't think there is a solution," Koeman said at a pre-match news conference.
"For me, it is more a social problem, it is not a matter of them being Catalans. It is more a matter of education, they have no values.
"We don't have to pay much attention, and it seems that it was only with me, but it has been with many players, with their families.
"It may be that with me it has been more exaggerated, but even Carles Puyol had to suffer.
"The club knows that this cannot be repeated and has to find another formula. It should not be given more attention, it is a social problem that happens all over the world, not just here."
Koeman, who has seen his side go winless in his three top-flight away trips, then echoed a similar sentiment as he reaffirmed the social issues causing the unnerving scenes.
"I have the images because there were two people in the back [of the car] filming for a documentary, my wife next door," he continued.
Koeman added: "When you go out there are many cameras, many telephones, a lot on TikTok for their followers ... it is a social problem that we have and it is better to put energy in other things."