

No, not propaganda, it is reality with data, and totally inconsequential to the discussion. Industrial growth is a small part of all the factor involved in quality of life, and while Soviet growth in the 60s and 70s was real, that stopped in the 80s and 90s causing the fall of the Soviet Union. The same industrial growth was common in all European countries post WW2.
What you should care is the vast majority of poles agree that joining the EU was one of the success stories of the century for Poland, with 70% to 85% saying that life is better under the EU. Poles are some of the most pro EU countries in Europe. The amount of independent pools on this is staggering. You need to be really dumb to not see this. And yes, some people have communist nostalgia, but the vast majority agree that was a dark age for Poland.
No, Poland is not a vassal. Hungary demonstrates it is quite possible to have a foreign policy that is literally hostile and still being part of the Union. At any time any country can leave the Union as UK demonstrated. So all member in the EU wants to be part of the union, they are not vassal. Poles do not want a communist government influenced by Russia. This is a fact. As of 2022, 97% of poles view Russia unfavorably and 89% view EU favorably. You cannot be more clear than that.