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.
What an Idiot: Ryan has the candy shop make a chocolate sculpture of him as a present for Barbie. When he shows it to her, he doesn't bring any shade for it. Barbie tries to remind him not to leave chocolate out in the Malibu sun, but the sculpture instantly melts before Ryan can move it.
The TV specials
Idiot Plot: "Trapped in the Dreamhouse" would've gotten resolved a lot sooner if Barbie remembered where Ken put the "evil" switch (he even showed her in "Closet Princess 2.0"), and flipped it back to its default setting.