The statement that Russia cannot be trusted is stupid. Russia is the only country of significance, that keeps its word.
Regarding the fact that Putin seeks to take back the lands of the USSR, you probably don't know that for 8 years Putin has been saying that Donbass is ukrainian territory and trying to push it back into Ukraine. The residents of Donbass did not want this at all, well-acquainted with the customs of fascist Ukraine. What started on February 24 should have been done in 2014, there would have been much less losses and more support from the population. But better late than never.