You seem to be quite misinformed about the war. It's openly known that Ukraine is running propaganda campaigns and intentionally publishes misleading information, to win the information war. Note, this isn't bad and in fact is encouraged by us western allies. We *want* Ukraine to lie. In fact that's how the last counter offensive happened. Ukraine ran a massive propaganda campaign about their "offensive" in the south, then attacked in the north. That's also why even western secret services don't know how many soldiers Ukraine has lost so far. That's also why we don't know who blew up Nordstream 1&2, even though the tracks point to a Ukrainian oligarch, as reported by reputable western newspapers.

But that doesn't mean that we - normal citizens in comfy chairs - can't try to look through the fog of war. No reason to go into the Reddit outrage mode. It's very possible that Ukraine has made a mistake or expects some military advantage from the dam breaking. But its also very possible that Russia broke the dam, to enhance their defense. Or it was an honest mistake due to lack of maintenance. Or it was a partisan group, who are active in this area. We will probably only really know in 2-3 months, when independent western experts have finished their investigation, anyone stating "facts" beforehand is just making up stuff. It isn't "victim" blaming to keep some rational mind in this conflict. We all know that Russia is a genocidal aggressor, but we also know that Ukraine is intentionally spreading misinformation, to gain military advantages.