It very well could be thought of as moral relativism, which ever seeks clever excuses for doing evil. But I think Paul makes it clear that certain people clearly choose evil and lies, over goodness and truth. They are deceived yes, but they choose to be deceived.
This is from the NLT translation:
"2:10 He will use every kind of evil deception to fool those on their way to destruction, because they refuse to love and accept the truth that would save them. 11 So God will cause them to be greatly deceived, and they will believe these lies. 12 Then they will be condemned for enjoying evil rather than believing the truth."