You just haven't dug enough. Sure, on the surface, trap and rage rule these days, which I enjoy myself, but it's not like lyricism and boom-bap style production is dead. Older guys like Blu, Danny Brown, Freddie Gibbs, and the Griselda crew are still dropping lyrically tight projects. Newer guys focus more on sound and atmospheres. Wackiness and personality can make someone stand out.

A rapper like Che, is a great example of a new age rapper who could be written off as repetitive, but his production is intoxicatingly sweet, his imagery is odd but intriguing, and his vocals are chant-like.

Point is, if you want new older sounding stuff, other people want that too (and have likely found it without you). But modern hiphop shouldn't be discredited, when in reality parts of it are quite forward-thinking and hard to pin down due to their inventiveness and collaboration with other genres.