For understandable reasons, global discourses around queer, feminist, and decolonial activism are unified by an emphasis on action, the agential, and the productive. Doing is what matters most, hence the critical focus of this special issue on how the doing gets done, or the forms that most effectively transmit action. However, these discourses risk reproducing the hard binaries by which political activity has historically been assessed, including success/ failure and resistance/passivity - in other words, they can unintentionally reinforce a racialized and gendered dichotomy between those who do things in the world and those who are simply undone by it. Such binaries further scaffold progress narratives that have long been weaponized against populations in the global South, founding good subjects, proper objects, legitimate politics, and viable futures in line with agendas set elsewhere. In this article, I turn to contemporary South African art to ask a different question: what might we learn from scenes of undoing instead? What expanded repertoire of actions, affects, alliances, and options emerges when we are sensitive to how decompositions, not just compositions, reroute agency, mediate relations, and make worlds? My article explores decomposition as a literal and figurative method in recent works by Zanele Muholi, Jean Brundrit, and Nolan Oswald Dennis, three South African artists who do not all align with notions of visual activism proper. But by placing pressure on the unruliness, vulnerabilities, and expressive limits of form and material, I argue that each artist usefully troubles the figure in whom normative notions of political agency are supposed to reside. In so doing, they sensitise their audiences to how vectors of precaritization and (in)capacity intersect today, unravelling the linear means-ends logics that conventionally underwrite theories of both art and activism.