kilmeran,
I’m honestly going to second what Wyoming said based on your description and system files. There are some known conflicts with the old build of chroma and overwatch. It’s caused blackscreen crashes and other weirdness. Razer released a fix in their latest synapse but I don’t know if it’ll be made available in synapse 2.0.
You might just try temporarily updating and following the instructions here. If it works, you know the culprit and can uninstall/downgrade again if you really need access to the chroma SDK features. If it doesn’t work, we know we’ve got more digging to do.