I used to have an older Photoshop CS5 version installed that I never really used much. Somehow there are so many "easy to use" photo software solutions out there, that I departed from the "Photoshop-Gold-standard" a long time ago. I keep Lightroom around just because there is still a good non-Cloud version available. I am absolutely not a Cloud person and I am not willing to pay continuous bucks for services that have been included in past "One-time-fee" products. I love my independence and my hermetic sealed island system of sovereignty. In times of Affinity, Pixelmator and many other attractive low prized solutions I don't feel a big loyalty to Adobe. For that, I am not "Pro" enough. Your own creativity should be in the center of your focus, not any brand name. But if you work with PS for a very long time, there is a compelling reason to keep going that rout. I tend to argue more for newcomers or semi-pro users like me.
Having said that, the black spots on PS images that you described sounds weird to me. Is that a bug on the graphic / display side of it, or do those spots indeed exist on a pixel kind of way in an actual image? I think that would be most important to find out.
To me, this sounds more like a driver issue or a compatibility or plug-in anomaly.