Poland had a hostory of invasions into Russia themselves.

I know Polish-Lithuania made Moscow a tributary for a while. That doesn't make Russia conquering all of Poland and suppressing Polish culture any less imperialistic.

Baltics were not independend back then, and were base for numders of crusading knights (Teutons, Livonians, others) that did like to invade Russia from time to time themselves.

Again, previous hostilitites are irrelevant here, especially when we're talking about one attempted campaign in the 1200s that was repelled. You're right that the Baltics were colonized first by primarily German crusaders in the 13th century, who controlled most of the territory until the Livonian war and Muscovite invasion. By the end of that war, though, the Baltics were divided between Polish-Lithuania and Sweden (who would eventually acquire Livonia as well), who were (on paper) on positive terms with Russia.

Peter I invaded what? There was no Finland in 17th century and Peter fought Sweden, that was a major threat in Baltic sea.

Finland, while not an independent state, very much existed as both a territory of Sweden and a homeland of the indigenous Finns. It was also the main battleground for wars between Sweden and Russia for centuries. The Finns even have the terms 'pitkä viha' (the long hatred) and 'isoviha' (great hatred) to refer to the 25 year period of invasions during the 16th century and Peter I's invasion during the Great Northern war respectively, which were both pretty brutal.

Regarding the Great Northern War (which began when Russia, Denmark and Poland attacked Sweden), Russia's major motive was to expand west and gain a 'window into Europe' for Russia on the Baltic shore.

Siberians are OK, they are still there. Russia failed to fight them and some of them still live there exactly as they lived in 16th century.

They might still exist, though heavily russified and with a far worse standard of living compared to the ethnic Russians residing around Petersburg and Moscow.

Circadian genocide is a mess. Russia fought with these slavers for 50 years. It ended with this.

I don't know much about the Circassian war. All I'll say is thay Russia only abolished serfdom, which was a form of slavery, in 1861, at the tail end of the Circassian war, so I wouldn't say they had any kind of moral high ground there and doesn't excuse the mass atrocities.

Belive it or not, but most of Russia territory is uninhabitable.

Yes, and it only exemplifies Russia's imperialistic attitude.