De Heideroosjes delivers a raw, unfiltered performance in 'Not Mad (Fucking Angry!)', a track that embodies the genre's signature blend of aggressive vocals and rhythmic intensity. The song serves as a direct emotional outlet, channeling frustration and defiance into a driving musical statement. With its stark production and confrontational tone, the recording aligns with the artist's broader discography of high-energy tracks that prioritize visceral impact over polished refinement. This piece stands as a testament to the artist's ability to capture the immediacy of anger, transforming personal irritation into a compelling sonic experience that resonates within the punk and alternative rock traditions.