That may be,
A. Doesn’t change the fact that Russia has done its fair share of invading,
B how many times has Ukraine invaded Russia?
C. Then why didn’t he invade Poland, militarily Ukraine was no threat IMO just the last low hanging fruit he thought he could grab
D. He chose unwisely
“B how many times has Ukraine invaded Russia?”
This is an interesting question. Parts of Ukraine were at one time parts of the Empire of the Golden Horde, the Tatar Khanate, or the Turkish empire, or Poland-Lithuania, or Austria-Hungary, etc. All of these warred with Russia at one time or another.
Ukraine as a “native” polity never invaded Russian lands that I know of, those times that they had their own state - in the days of the Cossack Hetmanate say.
Ukrainians have often joined others who were invading Russia. One notable case was when Ivan Mazepa supported the invading Swedes of Charles XII.