Most days I wish I could “cancel my subscription” to the overall scene.
This might sound a little preachy, and I don't mean it like that, but.. you can. Just stop engaging with it. Stop checking social media, "news", blogs, videos and all the miriad other ways others try to capture your attention so frequently. Develop an attitude that, when you see an a link to "10 things you didn't know about corn! Number 7 will shake your world!!1!11!", you think "a) I probably do know them, and b) I've managed to live without them so far, so I'll survive not clicking on this obvious clickbait".
The same with news. You don't actually need to read about the fresh new attrocity of the day, you're already aware of the cascade of awfulness that's occuring, so give yourself a break. You can always choose to catch up once a week or so to make sure you're not too far out of the loop.
I'm not going to say any of that is easy, at least to begin with, but it is all doable, and the benefit to your wellbeing is likely to be massive. You don't need to stop completely, but, at the very least, check these things only occasionally, and for a fixed amount of time.