>"The destruction of the dam, Russian President Vladimir Putin said in a news conference a week after the event, "ruined their counteroffensive in this direction." It was a comment that didn’t fit particularly well with his claim that the Ukrainians had destroyed the dam themselves."
It fits just fine. Ukraine was pressured into this offensive by its western partners and was publicly dragging its feet for months. They knew it wouldn't be successful.
Washing their hands of one of the fronts while doing a massive amount of damage to the Russian side of the Dnieper that they knew they were never going to recapture probably seemed like a good trade off.
The narrative that Russia blew it up and did more damage to themselves because they were terrified of the counter offensive, on the other hand, matches with reality about as well as "Russia blew up nordstream 2" did. Their public stance before the offensive was that it would be a catastrophic failure because it lacked air support and was at a munitions disadvantage and lo and behold that's exactly what happened.
So why on earth would they blow up a dam that would do far more damage to the areas they controlled?