> The reality is far simpler: Putin wants the Ukraine personally. His own private reasons are irrelevant. He wants it. And he has the will and capability to take it. And so he is doing so.
This situation is anything but simple.
Example 1: Russia invading Ukraine is powerful evidence to any other country that they need to join NATO for protection, most notably Finland and Sweden.
This is somewhat similar to one of the many problems with the US invading Iraq. It told the rest of the world that the only way to gurantee their safety was to have nuclear weapons. Putin's move drives neutral parties to NATO.
Example 2: while the EU in particular is unwilling to hit Russian energy exports, that situation may change with prolonged Russian aggression.
Example 3: the Russian invasion of Ukraine is deeply unpopular in Russia. Thousands of Russian protestors have been arrested already.
Example 4: Ukraine is a country of ~44M people. Russia cannot possibly hope to hold it. The insurgency cost will be enormous. Attempting to hold Afghanistan in the 1980s had a massive cost for the USSR and was arguably a contributing factor in the USSR's downfall (along with many other factors to be fair). Even if Russia simply plans to install a pro-Russian regime, that's not that dissimilar to what happened in Afghanistan. Occupying Ukraine would probably take hundreds of thousands of troops on an indefinite basis and have a massive cost in resources and lives.
> Putin wants Ukraine. Negotiation of any kind was never going to prevent this invasion,
That's basically the "trying is the first step to failing" School of Diplomacy. There are two broad possiblities: either it could defuse the situation or it couldn't. If it doesn't, then there's no downside to trying. In fact you get to occupy the moral high ground of at least trying.