Ostalgie [0] is a very real thing, particularly for older generations who actually lived and worked in the GDR, without ever conflicting with the government. Because not everything East was bad, and not everything in the West was perfect either. There was actually quite a bit of economic symbiosis [1] going on between both sides back then.
That's why for many, the GDR also meant stability and progress. I can still remember my grandmother living in a house with wood ovens for heating, no running warm water, and a literal drop toilet on the second floor where you had to manually rinse with a big water pitcher.
She then got moved to an apartment inside a newly built Plattenbau [2], offering quite some comforts that were previously reserved to only very few households.
After the wall fell, she moved out to another flat, but by now is back to living in one of those Plattenbau apartments. Guess how negative her opinions on the GDR time are?
[0] https://en.wikipedia.org/wiki/Ostalgie
[1] https://www.dw.com/de/ddr-als-billiglohnland-f%C3%BCr-den-we...
[2] https://en.wikipedia.org/wiki/Plattenbau