> etwas in der Absicht, es zu verbessern, schlechter machen > > https://www.duden.de/rechtschreibung/verschlimmbessern
"Making somewhere worse with the intention to make it better".
Better is the enemy of good.
Old Italian proverb: "il meglio è nemico del bene"
Shakespeare, King Lear: "Striving to better, oft we mar what's well".