These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Pretty Cure
YMMV tropes appearing throughout the entire Pretty Cure franchise.
Die for Our Ship: Male love interests to the Cures are regarded rather poorly by some shippers who pair the Cures with their fellow teammates. Some examples are Daisuke and Fujipi.
Dork Age: Everyone's got their seasons that they can't stand. From the plot of Doki Doki to the filler of Smile, every single season is decried as the franchise's Dork Age by somebody, with the exception of the first one where complaints are different.
Girl-Show Ghetto: Averted in that despite occasional cutesiness and girliness, the shows make sure to balance things out with more serious stuff that sets the Pretty Cure series apart from other girl shows. The Periphery Demographic consisting of older guys certainly helps.
LGBT Fanbase: Most Precure series are quite well liked among bi/lesbian anime fans.
Old Guard Versus New Blood: The lines are particularly drawn along Heartcatch (the season associated with the Newbie Boom, with some people declaring the show Ruined FOREVER) and Futari wa (with many older fans adoring Nagisa for the same selfishness and whining that the new fans find so grating they won't touch either of her seasons).
Periphery Demographic: Adult males, at least in the beginning. Given that there was a "marketing" paper that listed the "main target" as 4-to-12-year-old girls and 16-to-35-year-old men, no doubt they are now one of the main demographic.
The Scrappy: While she does have fans, Mana from Doki Doki is the most widely disliked lead Cure so far, mostly due to her Canon Sue and Spotlight-Stealing Squad tendencies, as well as being an admittedCreator's Pet. The team finisher's that involve the Magical Lovely Pad and it's harp form, are basically just the other cures giving Heart their powers, who defeats the Monster of the Week herself. It gets to the point where Doki Doki ends the same way as Digimon Xros Wars: The Young Hunters Leaping Through Time (whose lead, Taigiru, is also considered the worse lead of the Digimon Franchise) as in she takes everyone else's powers, along with the three sacred treasures, and fights the final battle alone in a new form. She's even considered one of the main reasons Doki Doki is so unpopular.
From the same series, Aguri/Cure Ace is immensely disliked, and is another reason for Doki Doki's unpopularity, due to to how she was introduced, her bratty Drill Sargent Nature, and the fact that she ends up replacing Makoto as the expositor for most of the remaining Myth Arc. Made worse by the fact that she tried to kill an amnesiac and powerless Ira. Turns out it was a test, but fans still hate her for it.
Explanation on how she's introduced. A new Cure is always a previously established character, and with that is sometimes either royalty or a girl who made a Heel-Face Turn. Aguri is despised for breaking that tradition and replacing a fan favorite. It looked like it was making Regina the new Cure. It is sadly thrown out when King Jikochu makes her evil again. Then Cure Ace shows up and easily defeats Regina, who is Put on a Bus for nearly the entire second half of Doki Doki. In the same episode it's quickly revealed that Ace is an Elementary School girl named Aguri, a new character who appears out of nowhere. Who then proceeds to do nothing but tell off the girls for several episodes.
Considering other Cures, Shiny Luminous is disliked among a group of fans for "not being a Cure" and/or having a flat personality and not fighting.
Cure Echo from the All-Stars movies is disliked for taking away focus from the other cures for the majority of the movie and doing even less than Shiny Luminous. It's made worse by the fact that she doesn't even become a Cure until the final 10 minutes of New Stage 1, and doesn't even fight, all she does is give Fuu-chan a cooldown hug then de-transforms.
Fairies have these as well. Futari wa had Porun, who is hated for his whiny and bratty personality and for only contributing by giving the Cures the items needed for their ultimate finisher, Rainbow Storm. He gets better in Max Heart when he becomes Shiny Luminous's partner, but the same season also introduces Lulun, who's even worse than him.
Milk from Yes Precure 5 is the most loathed fairy in the franchise. She's a gigantic hypocrite who deliberateley makes things difficult for the Cures and constantly insults Nozomi. Not helping is that she's needed for their ultimate finisher and ends up gaining a human form and becoming Milky Rose in Go Go!
Candy from Smile is disliked for her annoying nature, plots being kicked off because she acts like a moron, and generally being useless. It doesn't help that she's also somewhat of a Spotlight-Stealing Squad. Her older and more mature brother, Pop, is not only more liked than her, but fans express disappointment that he's not the main fairy and is a minor character who only shows up every now and then.
Seasonal Rot: Doki Doki Pretty Cure has the lowest average rating for a Precure season to date. Even lower than Suite. On the other hand, it has best ticket sales for its movie, beating out Heartcatch.