Here.

Numbers are indeed very high, but none of them reach 50%. And you’re right that general unhappiness while remaining married is hard to measure, but even that “gray divorce” rate (when the kids are not as big a factor) isn’t so high, which I think would be an indication.

Also, that’s only marriage. Lots of people are in stable LTRs (usually not their first, but that doesn’t mean much if they are in one now.)