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.
Americans Hate Tingle: The series has had a pretty cold reception in the USA (it's the 12th lowest rated show on Anime News Network). The widget nature of the show and the fact that the "straight" dub was the one aired on [adult swim] are probably the biggest reasons.
What Do You Mean, It's Not for Kids?: The commercials on [adult swim] made it pretty easy for viewers to mistake the show as the kids, until you see the words "Super" "Milk" "Chan" show up on a black screen. Plus the show is rated TV-14 (or TV-PG for the Vintage episodes).
The Gag Dub makes it even worse, slapping a TV-MA for harsher language.