If after ~30 years after break-up of USSR you have not gone back to russia (because quality of life in Estonia or Latvia is probably better), or have not learned the language or do not want to pledge loyalty to the country - then such person is a problem to itself. My social anecdotal bubble tells me that most of such people are very pro-soviet-union, but somehow idea of moving back to "mother russia" scares them.
Also in most post-soviet states russian communities can live all their lives without learning local language, i.e. there are native-russian kindergartens, schools, even university programs, russian entertainment and they can expect and be able to communicate almost everywhere in russian. So where's the bad treatment?
Putin's propaganda machine will make shit up on the spot - treatment of russian speaking communities is one of them. Maybe you also believe that there's fascist junta in Ukraine or Estonia? russian troll industry are masters of fake news - that will flood everything with multiple bullshit statements.