I see that Russians are trying to protest against this war on Ukraine to stop the killing but the government police and other forces keep beating them and locking them up that is the problem.
That's not unexpected. That is part of the fight against autocratic governments, unfortunately.
For now, they are too few and the police can "handle" them. They need to be more. When the entire country will be against them, the police will stop, they cannot put their own family and friends into jail forever.
Believe me, I know. Just read more about what has happened in Romania in December 1989.