You don’t necessarily have to get rid of the crystals, especially if they are important to the narrative. What you can do is to manage your tonal composition so they don’t draw as much attention.
What’s happening right now, is you have too much contrast everywhere, and this is a common problem in the works of less experienced artists. They think they have to render everything with full dynamic range, using both very light and very dark values on every object, and ends up creating a image that’s too contrasty and lacks a sense of overall visual design in tonal composition. when you squint your eyes, your image should not have really light and dark values intermingled everywhere.
Instead, you should consider the entire image’s dynamic range, instead of pushing the dynamic range on each individual object/surface. Some areas in your scene can be quite dark and without any lighter values at all, and some can be all lighter values without much darker values. Imagine if you simplified your entire scene into just contour shapes of each object, with flat values/colors and no gradations. Now imagine how you’d arrange/manage their values so this scene reads clearly yet has a strong sense of coherency.