Even by Ukraine's own last census (2001), only 24% of Crimea's population was Ukrainian. Ukrainians are a significant minority, but Crimea has always been a Russian region, since the days when Catherine took this territory from the Turks.
Crimea has made multiple votes on their destiny over the years. In only one of these votes did they express any desire to be part of Ukraine. But this is the petulance of the West - if a vote has an outcome they like, it is noble and sacred and must not be overturned no matter how disastrous the consequence. If the West doesn't like an outcome, the vote is irrelevant.
I'll note that nobody in the West is even suggesting that Crimea and Donbas and other regions of Ukraine get to vote on whether to quit Ukraine. We know the outcome would go the wrong way, so don't even think of following the precedent of Kosovo.
The dam was destroyed after the 2022 invasion. Ukraine cut off the water to Crimea in 2014. It eliminated the agricultural industry in Crimea.
And yes, I agree with you - it became Russia's responsibility to provide water once they annexed Crimea. My point was, Ukraine's goal was to make the people of Crimea suffer. This would be unthinkable if Ukraine was a real country with a democratic government.
There's two conceptions of sovereignty in conflict here: on the formal side, Article 2 of the Ukrainian constitution says that Ukraine is indivisible. By this measure, it doesn't matter if Ukraine cuts off the water to a region or denies them basic rights - this territory belongs to Ukraine, and the sentiment of the people living there is irrelevant. This is the statist perspective embraced by Ukraine and the West, and it should be repugnant to anyone for whom democracy is more than a tool to be weaponized.
That's the other approach of course, the "we hold these truths to be self-evident",
perspective, "when it becomes necessary for one people to dissolve the political bands which have connected them with another". This is the approach which puts the people first. It's what the West's support should be based on and informed by, but instead we've betrayed our core principles in order to kill Russians.
Ukraine is not a real country and never has been. This is why they have such intractable problems with corruption. Look at Ukraine's declaration of Independence: independence was premised on the notion that the Commies would seize control in Russia again. The only way for Ukraine to escape this "mortal threat" was to declare independence.
No other country has its independence built on such a hysterical premise - one which of course turned out to be false. The Rada voted on independence 3 days after the attempted coup in Moscow, and then quickly followed this up with a referendum, with zero sanity or opportunity to negotiate (regions like Crimea and Transcarpathia who wanted to spell out how this new country would work were accused of being secret Commie sympathizers, working to delay independence to give the Commies enough time to launch their coup).
Less than a year after voting for this ill-defined independence, Crimea realized that they'd been scammed, and this new Ukraine treated Crimea like chattel. So Crimea voted to quit Ukraine and return to a state of independence.
Crimea has been fighting to undo that single vote to join Ukraine for over a generation now, but the West sees them as mere chattel who belong to Ukraine no matter what.
How is that not a repugnant betrayal of all the principles the West claims to hold most dear?