Very likely excluding the purges. Though even some are quitting (or arrested) Putin's administration on their own.Does it include the pre-war purges by Stalin? /s
From link for an example.
Anatoly Chubais, a high-ranking Russian official who led the country’s post-Soviet economic reforms, has resigned from his post and fled the country in opposition to Russia’s invasion of Ukraine, multiple news outlets reported Wednesday, making him the first high-level figure to officially distance himself from the Kremlin.
Moscow has ratcheted up pressure on domestic opponents of Russia’s attack on Ukraine. Putin said last week that the Russian public “will always be able to distinguish true patriots from scum and traitors.” He went on to warn that he would take action against critics on grounds Russia would be strengthened by what he called “necessary self-purification.” Russian police have arrested around 15,000 people for protesting the invasion of Ukraine, according to the Russian human rights organization OVD-Info.