^First, there is plenty of proof of Ukraine bombing the rim of this same dam last year with HIMARS rockets.
Second, it's highly unlikely that the Russians did it, as the dam provided them with strategic leverage over the Dniepr in the Kherson oblast. Before the dam broke, they could, at any moment of their choosing, flood and cut off any large Ukrainian armed contingent that manages to cross over into the left bank. That is one of the main reasons Ukraine bombed it. The other incentive was to take away from the PR disaster of the early stages of the Ukrainian offensive.
I do understand that this kind of basic rational analysis is above your pay grade when it comes to this topic.
In other news, Putin stated in his long press conference today that since the start of the Ukrainian offensive on June 4th, Ukraine has lost 160 tanks and 360 armored vehicles, representing about 30% of the total armored fleet provided by NATO. This doesn't bode well for Ukraine in this war of attrition as the NATO inventories are already drained.
The silver lining of the failure of the Ukrainian offensive is that they might be forced to negotiate a settlement, as the situation is most likely going to worsen with Ukraine's dwindling military resources. We might be getting a lot closer to a resolution of the military phase of this conflict by this winter, if not earlier.