This paper explores the constraints on sub-GeV dark matter (DM) particles, focusing on fermionic and scalar models coupled to a dark photon with kinetic mixing. The authors combine cosmological, astrophysical, accelerator, and direct detection constraints to perform frequentist and Bayesian global analyses. For fermionic DM, viable parameter regions near the dark photon resonance are found, which expand significantly with a particle-antiparticle asymmetry. For scalar DM, the velocity-dependent annihilation cross section avoids strong constraints even in the symmetric case. Bayesian model comparison shows that both asymmetric fermionic DM and symmetric scalar DM are preferred over symmetric fermionic DM due to reduced fine-tuning penalties. The paper also discusses the discovery prospects of near-future experiments, proposing a new benchmark point that aligns with current constraints and is suitable for future searches. The main findings are illustrated in Figure 1, which shows the allowed parameter regions for asymmetric fermionic DM compared to projected experimental sensitivities.This paper explores the constraints on sub-GeV dark matter (DM) particles, focusing on fermionic and scalar models coupled to a dark photon with kinetic mixing. The authors combine cosmological, astrophysical, accelerator, and direct detection constraints to perform frequentist and Bayesian global analyses. For fermionic DM, viable parameter regions near the dark photon resonance are found, which expand significantly with a particle-antiparticle asymmetry. For scalar DM, the velocity-dependent annihilation cross section avoids strong constraints even in the symmetric case. Bayesian model comparison shows that both asymmetric fermionic DM and symmetric scalar DM are preferred over symmetric fermionic DM due to reduced fine-tuning penalties. The paper also discusses the discovery prospects of near-future experiments, proposing a new benchmark point that aligns with current constraints and is suitable for future searches. The main findings are illustrated in Figure 1, which shows the allowed parameter regions for asymmetric fermionic DM compared to projected experimental sensitivities.