to be frank, the problems in Doki Doki are not so painful, it's simply lack of time and bad distributions of elements. Others are the typical silly things that at that time thought they were not bad, until...
HetCharge is the worst season of Precure and not only because of the terribly written het or that production likes to scrub it in the face as something good.
That season has a lot of new elements, but it does absolutely nothing good with them, I do not exaggerate when saying that it is at the same level of a Precure fanserie, the writer insists that it is Precure but lacks the elements that make Precure great. (Yes suffers from similar problems)
if it serves as a consolation, Hetcharge had bad sales and also bad reception, Toei was afraid that Pincesa would happen something similar, changed the producer, things het were reduced and mysteriously everything improved for Precure in general (sales and reception) is funny as the Maho Precure appear in the Kira Kira movie and even in the All Star movie they are basically the main characters (I want to think that the format change in All-Stars is to not put Hetcharge on the screen again.)the only one who thought that Hetcharge was good was a certain idiot in a blog, even hated Suit. It's funny how it turned out at the end (HibiKana being an even popular couple)