However, German tech (to me!) has a overengineering problem, not a verschlimmbessern problem, there's nothing being improved. Just look at modern German cars, impossible to fix yourself, very expensive to have serviced, for no real gain, pure overengineering. Is there a word?
(edit: there's an opposite for OP's 'Lebensmut' - 'Lebensmüdigkeit', literally 'tired of being alive', i.e. suicidal)