You kinda blamed Germany on trapping Poles with middle incomes..
Define blame. Germany has what it has i.e. economy and Germany does what it does i.e. realizes its interest. There is nothing to blame them for. As it happens some of their polices will hurt Poland's interests and make it really difficult to escape said trap.
It is more so because of the EU thingy.
The EU on a practical level works for Germany and France. Again there is nothing to blame. However a difference between declarative aim of the EU and reality is huge and that gap is growing after Brexit whence EU lost a country that kept it all balanced to same extend.
So there is a strong drive to built an empire with a neo-Marxist ideology as a unifying cultural factor (which included same sex marriages, adoption of kids, LGBT, gender studies and so on). All of that will be basically a new dogma.
On a practical level there won't be any union with states on a equal footing but two or three tier system where Poland and eastern European countries will stay on the bottom rung, as a semi-colonies of the EU core.
All that painted over with the usual gibber jabber of democracy, equality and laws of the market as well as a hefty doze of hate propaganda directed at 'nationalist', 'far-right radicals' and all kind of alleged- phobic.
IF all that would have been put to people in Poland unadorned and showed for what it is and what there is to expect I wouldn't' have had any issues with EU.
The big problem I see is the fact people are being fed a lie while their children are being brainwashed.
So no. I don't think that is anti-polish issue in German politics it rather ,it ain't personal - says a villain in a movie before trying to kill a hero lol!
Although there is an element of using anti-Polish sentiments and stereotypes against any Polish parties or a government that doesn't act as total lacey of German interests.. on the other hand there is a lot of playing on Hitler/ Nazis stereotypes from the other side too.
On that note I think that German populace is rather unaware what they occupation in Poland meant for the local people and what kind of geocidal hell they made it for them. On the other hand they are overfed with Holocausts. Also lots Germans believes that Poland is overplaying so called victim card blowing things out of proportion when in fact the opposite is true.
Oh now some random thought - I think Poland played it cards rather badly before the war to end up like it did. Hell France lost like 20 000 civilians during that war, shipped all their Jews to German dead camps before they even asked and they are victors and heroes of the WWII. lol!
Sure lot of it mounts to economical, military and overall political weight of a country but not all. Frenchies could be laughed at behind their backs as cowards but who cares, they are the ones that laughed last.