No, a lot of people dislike Ariana because "she looks like a boy" or "she looks like an 8 year old"
(her body shape is pretty much a rectangle and she's really flat)
They also think she's really annoying and potentially very fake.
except you're comparing Ariana to someone who has publicly done a lot of sht that's disrespectful. While I find Ariana a bit annoying and her views are annoying (She posted a video a few months ago defending Bieber and Miley, saying they were doing what everyone else does at that age.) she's nowhere near how disrespectful Bieber's been, even to his own fans.
His newest thing is his "parody" of his own song One Less Lonely Girl. You can find it pretty easy through Google, or Facebook's trending topics. Using the N-word and KKK stuff.
Drag racing in a residential area.
Graffiti on tour, on public property.
Disrespecting the country's flag OF THE COUNTRY HE WAS IN (and this was a punishable offense in that country too, but he got off because he's famous) ON STAGE WHILE ON TOUR.
Late to his own concerts that are on a school night, when his fans are primarily young girls.
and way too much for me to list.
As far as I know, Ariana hasn't even been in a quarter of that much trouble.