Need advice on avoiding flickering reflections for real-time use

I think there’s something fundamentally broken in my scene. I did a ton of research on what you said and tried many different methods and not a single thing even changed in my scene. I mean sure I can set TSR and upscale to 200% and get 7fps for a slight improvement. But that’s it.

Is it my geometry? my ceiling is a thin plane with 2-sided enabled. The static meshes that are my tube lights have an emissive texture (which is supplemented with actual lights). You can see that the emissive light really affects the GI/Reflections (I think it’s GI more than reflections?) worse than a regular light:

What you essentially see is that emissive + shadows is where it gets bad.

hardly any of my post process setting seem to affect the scene (I have unbound checked).

I’ve tried: r.Lumen.Reflections.Temporal.MaxFramesAccumulated=32 and literally nothing changes.