The Turk scored in the 1-1 draw with ADO Den Haag - his first goal since December 6.
"People just talk. It motivates me just to hear these people talking," Ünal told FOX Sports.
"What people? Everyone. It is not directed against anyone, it just happens some times."
On the prospect of extending his loan next season, he added: "I focus now only on the upcoming games. I want to give everything. I like the fans, the club. Then we'll see."