  We present a simple model of dark matter that can address astrophysical and
cosmological puzzles across a wide range of scales. The model is an application
of the Secretly Asymmetric Dark Matter mechanism, where several flavors of dark
matter are fully asymmetric despite an exact dark matter number symmetry
$U(1)_{\chi}$. The dark matter relic abundance arises from these asymmetries,
generated in the early universe through right-handed neutrino decays. The
$U(1)_{\chi}$ is gauged by a massless dark photon, and asymmetries with
opposite signs in the different DM flavors result in the formation of bound
states. Dark acoustic oscillations in the early universe lead to a suppression
in the matter power spectrum for addressing the $\sigma_8$ problem. The dark
photon as a relativistic degree of freedom contributes to $\Delta N_{eff}$,
easing the tension between the CMB and late-time $H_{0}$ measurements. Finally,
scattering between the bound states after structure formation leads to a
flattening of the dark matter distribution at the cores of haloes.
