pejorism
/ˈpiːdʒərɪz(ə)m/ /ˈpɛdʒərɪz(ə)m/noun
The belief that the world is becoming worse.
Origin
Late 19th century; earliest use found in Friedrich Max Müller (1823–1900), Sanskritist and philologist. From classical Latin pēior worse + -ism, after pessimism.