Snowdens recent conversations around Russia and Russia's invasion of Ukraine have tinted or confirmed biases against Snowden as a traitor and stooge of the Russian government.
See: https://www.aljazeera.com/opinions/2022/12/18/the-trouble-wi...
See: https://www.aljazeera.com/opinions/2022/12/18/the-trouble-wi...
He obviously had a negative opinion about the US government and very little trust for it, so he is quite biased, but that seems expected given his history. I don't read this as him somehow supporting the Russian invasion of Ukraine.