Did the PCV write it off as a mere inter-imperalist war, where both parts are to blame, and not a result of The West expansion towards Russia in violation of previous agreements?

Yes, they did, there are a few groups like this lying around. They're using the same cherrypicking used to condemn "Venezuelan imperialism" over Guyana-Essequibo. Same that Konstantin Syomin is using to denounce Hamas as an Iranian proxy (turning the genocide into an "inter-imperialist war", which is essentially a byword for "I don't give a fuck about this yay" in this school of thought). I can walk you through the history of the colonial claims on that region & how it relates to Venezuela's independence if you like.

Adding a little curtsy about how the US aggressed after using the Minsk agreement to buy time doesn't take away from this idealistic abomination.

Also, this thread is not my information source, it is conveniently bite sized so people can actually read it. I have plenty of other sources for you.