I kind of hate Juan Ramón Jiménez. I know he is very very good and all, in the way that all the critics describe and I could too if I were to explain all that, but I hate him. Compare "El nombre conseguido de los nombres" with Beckett's "fail better." These are two late modernisms, one conceived of as a struggle you will never win, the other as a battle you've already won definitively. Beckett and Vallejo and Lorca are in one category; Juan Ramón Jiménez in the other. Or so I'd like to argue. It may be a kind of caricature. I don't really care because I cannot read Jiménez without that caricature being shoved in my face.
So that explains a lot. You could react against the aestheticism of Juan Ramón and look really good if you were politically engaged. Or you could write really bad "essentialist" poetry like Juan Ramón's, but worse, and sound very acceptable, because that is sort of normal cursi-sounding Spanish poetry. So JRJ was the model for everyone. What was missing from the Machado / Jiménez dialectic was the poetry of fractured subjectivity, like that of Vallejo, Lorca, or Beckett.