Ocean acidification tipping point, climate change tipping point, rose of wars and fascism, microplastocs - these are just facts of things that are happening. I feel like doom scrolling would be an exaggeration of things that are happening or will happen, not just reading about reality.
You have only your own capacity to do good, and you should hope to maximize it. Will more information about additional malignanciee help or impede your ability to do good?