PC RGB is sending full signal RGB rather than limited. Most TVs by default expect limited. Sending a full signal unless you set your TV appropriately means you will be crushing blacks. That isn’t good picture quality. Setting to 32bit colour for games made in RGB will also very likely result in some ugly colour banding. If you’re watching HDR and it looks worse then something is wrong in your setup. Or you don’t appreciate genuine picture quality - many people don’t like HDR because it makes pictures more realistic yet people tend to favour overblown contrast and colour.