Roblox usually ran for DirectX 11 which isn't ideal for wine. To disable DirectX you can use Grapejuice and go to "Roblox FFlag editor" under launcher and enable "FFlagDebugGraphicsDisableDirect3D11" and "FFlagDebugGraphicsDisableDirect3D9". If you want to prefer either OpenGL or Vulkan enable either "FFlagDebugGraphicsPreferVulkan" or "FFlagDebugGraphicsPreferOpenGL" in the Roblox FFlag editor.