I had heard this in the 1980s - the East German government didn’t bother cleaning up the war mess. This is great to see - shove it in the FACE of leftists. They had 45 years to clean it up and didn’t bother.
East Germany looked about the same as it did in 1945.
I lived in Warsaw for two years (1981-83)and then moved to West Berlin for four years and traveled to East Berlin often. Big difference.