https://dictionary.cambridge.org/dictionary/english/en & https://en.m.wiktionary.org/wiki/-ification#English both combine to make a word that means to add to something making it shitter

Shittification would be to make a shit, you could argue that 'en' means that you make something else shitter I think

English is weird https://en.m.wikipedia.org/wiki/Enshittification