Not arguing against the political failures, but mind that the impressions of "several family members" do not yield figures reliable for any conclusions.
As an example: if (!!) the 10% decline was adjusted by the official inflation, would you believe that it was 2% from 2015-2020 or would you rather go for 5% that reflect also real-estate and other commodities relevant for industry (e.g., if steel increased 50%, so might industry output simply because of price changes). So, the “official figures” could be vastly inflated and the situation could be a lot worse even.