The Problem With the Standard Model

We're confident about how gravity works like on the microscope or macroscopic level and then we're confident about like quantum mechanics but we don't know how to relate the two. Well I think that the problem with the standard model might be that it is incomplete. It may not have the particles to describe for example quantum gravity so it can be reconciled with general relativity. People are curious if there is some sort of emergent phenomena of smaller particles even smaller than those that we observe in the standard model.