Exactly. Had the west not interfered, the USSR would recover from the 80s crisis. Instead, they took advantage of its shortcomings and managed to break up the union: Gorbachev is considered by many Russians a traitor, but he was not the only western investment in toppling the Soviet Union.
Let's remind that full-on opening of the market was not what the west promised, but it's what they pushed for once the reforms passed a point of no return and they wouldn't take "no" for an answer. Propaganda is what won the cold war.
I think you miss a crucial fact here - large part of Soviet block was incorporated by force and wanted to get rid of their influence as fast as possible. Nobody misses USRR here in Poland.
Poland is a weird example since it doesn’t seem like they fit in the EU either, almost like an outcast.
But let’s look at other ex-Soviet countries. Territorial quarrels and dumb nationalism were unthinkable back then. Look at Azerbaijani and Armenians, ethnic Ukrainians and Russians in Ukraine, Georgia...
If only we ("other ex-Soviet countries") could stop our "dumb nationalism" and go back to being nice "little-brother nations", speaking Russian, fighting Western imperialism together somewhere in Afghanistan after being drafted to glorious Red army... Those where the times, comrade!
Or you can compare countries from a similar regions that decided to stick close to Russia (Ukraine and Belarus) vs countries that decided to stick with the West (Poland, Estonia, Lithuania, Latvia).
Let's remind that full-on opening of the market was not what the west promised, but it's what they pushed for once the reforms passed a point of no return and they wouldn't take "no" for an answer. Propaganda is what won the cold war.