What happened to the english writing?

English wasn't too good from the start, BUT... it has become completely unreadable... so much nonsense and horribly stupid and incomprehensible English writing. The writer must have changed (I'm reading chapter 1505, and for over 200 chapters this has been ridiculous!) because whoever is writing this now DOES NOT know English at all...  why would this be allowed? it's an absolute insult to the readers!