We use ultra-large all-atom molecular dynamics simulations coupled with Brewster Angle Microscopy of submicron marine aerosols to understand the link between chemical complexity and aerosol morphology. We show that fatty acid surfactants readily aggregate and distribute to the surface and into oily aggregates within the aerosol. We find that rigid lipid monolayers at curved aerosol surfaces form discontinuous patches, separated by disordered regions in which amphiphilic species such as BCL and LPS can aggregate. The overall distribution of organic material throughout the particle is consistent across variations in the organic phase complexity, and in more complex particles, less of the aerosol surface is covered. We argue that organic SSA may not always phase separate to adopt a "core-shell" morphology where the aerosol surface is coated with a thick organic layer.