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: Dance Moms
Audience-Alienating Premise: Many people won't even touch the show with a ten-foot pole because it appears to be exploitative of young girls in a number of areas.
Base Breaker: Abby. Dear Lord, Abby. She's been called an incredible number of horrible things and is seen on the surface as a mere Sadist Teacher.
Broken Base: GOOD GOD. Outside of the show's fanbase, there are those who believe the show is borderline child abuse.
Brooke and Mackenzie's albums have received the same reaction. There are those (preferably already fans of the show) who enjoy the songs, and those (preferably those who have no idea what Dance Moms is) who despise the gratuitous autotune.
Moral Event Horizon: Abby more or less crosses it in "You've Been Unfriended", when she decides to pick on Chloe just after she's gotten back from suspension, even going as far as calling her names like "blondie".
What an Idiot: Kelly decides to invite Leslie to her 41st birthday party, despite the other moms not exactly being besties with her. Her reasoning? They didn't invite Leslie to their little lunch break and Kelly felt like she had to invite her. Leslie then proceeds to get into a big quarrel with Christi and leaves her in tears. The episode was called "Worst Birthday Party Ever" for a reason. All because of weak obligation.
Kelly even said that she didn't enjoy Leslie's presence when she came.
The Woobie: Let's face it: everyone on the show has been a woobie at some point.
Unfortunate Implications: In one season 4 episode, Abby decides that Nia, one of the only black girls on the show, will dance the part of a dog. Only a little iffy on its own...until it turns out that the costume includes a collar and a leash. Someone didn't think that through.
Then in the very next episode, Jade (only Asian girl currently on the show) gets a solo called Far East, which involves stereotypical Chinese music, a fan, and a cheongsam-based costume. At least it's an acrobatic solo instead of trying to mimic actual Chinese dances. However, the group routine for that week is a gypsy-based dance, and "gypsy" is considered a slur among the Romani people and is considered rather stereotypical.
And now, two episodes after that, the girls decide to do a Native American-based dance, with the girls in war paint and the lead dancer, Nia, in a war headdress.
Way back in season 4, Abby had Nia doing several "ethnic" themed solos involved various non-white cultures. Holly argued against it saying it makes her uncomfortable, especially since the other girls (who at that point were all white) didn't have any dances like that.