Or it may not need fixing at all since the added contrast and deep blacks might make up for it. The presets we use which include bloom don’t push the brightness limits of any display technology like a shader like Sony Megatron Color Video Monitor would or presets like @Nesguy’s would so I don’t think it’s anything to worry about.
From what I’ve seen of your recent presets, the brightness looks pretty normal, for example in the recent RetroCrisis videos, on my OLED TV.