Explore the fascinating world of neutrino physics and dark matter in this 40-minute conference talk from the Interdisciplinary Developments in Neutrino Physics Conference. Delve into topics such as neutrino mass generation, dark matter production, and cosmological structure formation. Examine the challenges in canonical dark matter models, including the "Too big to fail" problem and small-scale cut-offs in the matter power spectrum. Investigate thermal and non-resonant production mechanisms for dark matter, and learn about the latest constraints from lensing observations on substructure. Discover the potential of upcoming missions like PRISM and the Enhanced X-ray Timing Explorer for advancing our understanding of these elusive particles. Gain insights into the interdisciplinary nature of neutrino physics and its connections to astrophysics, cosmology, and particle physics.