Has anime improved over the years or gotten worse?
Before anyone tries to make a shitpost, bear in mind that a type of media doesn't "improve" nor "becomes worse". Any media only "broadens" since, if for instance you say anime became worse over the years, then you'd be comparing current generic anime to previous great works and mediocre works alike.
Anime has changed fundamentally quite a bit.
Large portions of it have remained unchanged and very familar.
If its better or worse is subjective.
Well since Light novels and VNs tend to get anime adapations more frequently I'd say yes to novels and a big fat maybe to manga.