Again, if you fight for an enemy nation in a war expect people are going to be angry at you.
There was no fight for an enemy nation in Odessa. There were anti-Maidan protesters.
Yanokovych employed snipers against massive peaceful protests, they occupied buildings but they also had hundreds of thousands of people. The pro-Russians have never had a tenth as many.
Except that it was not even proven that it was Yanukovich who used the snipers. And he wasn't indiscriminately shelling civilians in western Ukraine either. I have a coworker from Ukraine, his extended family in Donetsk (a young woman with two children) was killed by Ukrainian artillery.
Like I said, Yanukovich was a bloody crook, a common criminal who came to power, but compared to the current Ukrainian government he was almost a saint.
And you can't compare Yanoyovych's actions to a defence from an actual invasion.
What invasion are you talking about? There is a civil war going on. Irregulars on one side, quickly legalized former irregulars on the other side. Ukraine would never stand a chance against an actual invasion from Russia. Compare that to the utterly professional and practically bloodless annexion of Crimea. And this is why Ukrainian army doesn't even try to do anything about that, they know they don't stand a chance. Shelling cities, on the other hand, is easy. Especially these in Eastern Ukraine - Galicians don't consider Eastern Ukrainians to be real Ukrainians, even though they themselves were ousted from Poland when ethnic Poles were thrown out of Western Ukraine after WW2. They don't even speak the same language - a mix of Ukrainian and Polish by the Galicians, Surzhik by Eastern Ukrainian.
There's nothing criminal or fascist about the current rulers.
Svoboda was recognized as a neo-nazi party by basically every European country. And even though this party was in minority in the last elections, they suddenly have received a lot of interesting positions after Maidan because their armed thugs helped the coup. And what followed were banning oppositional parties, censorship of media and other nice things that typically follow after a fascist coup.
Tell me what they should have done in response to an invasion that you wouldn't consider "criminal" or "fascist".
An invasion has to happen first. Then one regular army can fight another regular army.