On 2018's vibrant Sorpresa Familia, Mourn celebrated the end of the label issues that hampered them from playing and promoting their music. However, they're still frustrated by plenty of other things -- capitalism, the patriarchy, relationships -- and on Self Worth, they tackle them head-on. Somehow, they sound even more liberated on these songs than they did on Sorpresa Familia. Self Worth is filled with big guitars and even bigger harmonies, both of which fuel the pure cathartic joy of "This Feeling Is Disgusting," where the band acknowledges the general awfulness of things by shouting "it sucks!" Jazz Rodríguez Bueno and Carla Pérez Vas' vocals ring out boldly and brightly here and on "It's a Frog's World," where their fierce, gorgeous interplay reaffirms how they excel at transforming their frustrations into something beautiful. Mourn don't just raise their voices on Self Worth; they also raise the volume of their music. New drummer Victor Álvarez Ridao is a worthy addition to the group, providing a whomping backbeat for the chaos the rest of the band unleashes on "Stay There" and taking the spotlight on "I'm in Trouble," a knotty portrait of self-absorption. On "Worthy Mushroom"'s taut expression of existential dread in a world where a person's value is measured by money, the nagging guitar hook sounds like the only thing keeping Bueno and Vas grounded. The confidence that courses through Self Worth is matched by Mourn's unguarded songwriting. They don't mince words on scathing songs like "Apathy" and "Men," where they sing "in their eyes, I am meat." Mourn also take time to honor the moments and people that give them strength on "Gather, Really," a short, sharp tribute to the times that "help us keep going." Knowing your value and demanding respect are some of the most punk things women can do, and on Self Worth, Mourn do both with fiery eloquence.