There is zero evidence that Putin or his government has poisoned anyone, that's why he hasn't been indicted at the Hague. If there was any substantial evidence showing that Putin or the Russian government were involved in the murder of political dissidents or journalists, it would go straight to the Hague, like a rocket. Quick. The reason the US and EU, haven't tried to open a case, is because there isn't one. It's that simple. The day you and your buddies present the evidence to the international court and win a case against Putin, I will be there standing beside you condemning him and the Russian government for murdering political opponents and journalists. If no evidence exists, then all you have are empty accusations.
The post-2014 coup Ukrainian presidents and government "order" is to de-Russify Ukraine, at every level. Politically, culturally, historically, linquistically..etc, hence why the Russo-Ukrainians in the Donbas and Crimea refused to accept the results of the Maidan, US-orchestrated coup. If you want to debate to what extent the US was involved in the 2014 coup, we can do that but regardless of whether the US was or wasn't directly involved in organizing it, the ethnic Russians, not just in the Donbas and Crimea but in Odesa and across Ukraine, were not in favor of eliminating Yanukovych, a Russian friendly president, and replacing him with Poroshenko, a man that hates everything Russian.
It's only natural that many Russo-Ukrainians wouldn't go along with the anti-Russian agenda. Politically and otherwise. They've been ostracized in an attempt to purge Ukraine of them, free of implementing a Nazi-style "total solution". If the Russo-Ukrainians don't actively resist the derussification of Ukraine, more or less acquiescing to it as the ethnic Russians living in places like Kyiv and Odesa have done, then they're not arrested or worse. The ethnic Russians of Ukraine that refuse to follow the anti-Russian program, are seen as the enemy and become targets of the government and ultra-nationalists. The Ukrainians that want to turn Ukraine into a Western European country, that is a member of the EU and NATO, would prefer that 35% of Ukraine's population, namely its ethnic Russians, migrated to Russia, leaving behind their homes, lands, careers, and businesses in Ukraine. Why would they do that?
With respect to censorship in Russia. Russia apparently doesn't prohibit its people from expressing their objections to the war, because they do it frequently in the Russian media. There are debates on Russian television about the war, much more so than what we see here in the Western media. There are also Russian bloggers and vloggers online, some are on YouTube constantly attacking Putin. What is prohibited are the foreign funded NGOs from organizing public protests and continuing their anti-Russian, foreign-funded campaigns against Russia, when Russia is at war against the United States and its Western allies. Ukraine is seen by many Russians as a proxy tool of the US vs Russia. If you notice, all Russian media outlets have been banned in the West. RT, Sputnik, and others, have been de-platformed and closed down in the West. Practically everything Russian has been in a way, banned and silenced, even well known Russian playwrites, authors and artists of the past. Any mention of Russia or anything Russian is being shit on and "deleted".
I know several college students who are pro-Russia and they set up a table here in Manhattan with pamphlets and some signs, and banners, near grand central station. They got physically assaulted by some "woke" liberals. The table was flipped, all of the pamphletes blew away in the wind, into the street. One of these young men ended up in the hospital with a concussion. He was brutally beaten down to the ground and his head was stomped on the concrete sidewalk. One of the attackers was a heavily tattood and pierced, blue haired, 300+ pound transsexual freak standing over six feet tall. The most passionate defenders of Ukraine are the alphabet-rainbow people, because Putin doesn't allow "gay pride" parades, homosexuals to adopt children, any LGBTQA+ media promoting homosexuality to the Russian public on television, radio or print. . Here in the US if you're pro-Russia and in a liberal city like the one I live in, you can't organize a public demontration for Russia, without getting jumped by an army of militant homosexuals.