Another way to say "decide they're against the merger" is "evaluate the situation and make a timely ruling that they oppose the merger as illegal."

Which is exactly what they were supposed to do. Adobe and Figma tried to argue with the regulators or find a compromise, but couldn't come up with a solution that satisfied all parties.

If you try to extract subtle implications from the phrasing of a commenter on HN, you're likely to jump to the wrong conclusion.