Aurora, because they made her out to be a complete imbecile that can't accomplish any task who sings like a generic pop star.

I think Mulan too, though I love the Mulan sequel <3

^LOL. But yeah, Aurora is the only one I think would feel the most insulted by her's.

Belle would love her's, it's like someone recorded her and Beast doing cute things. It's movies she'd watch as home videos.

Because they changed her persoality completely!

They made Aurora look irresponsible and easily tempted into making wrong decisions.

They made Aurora an irresponsible idiot

they made her so cocky, less confident and with an annoying voice

Also Aurora and Belle.

Pocahontas, well, for obvious reasons.
Aurora, for the reasons stated above.
Belle, because when Beast was treating her rather rudely (mostly in the Christmas sequel), she didn't seem that bothered by it. In the first movie, she was angry and didn't want to put up with his crap. In the sequels, she sucked it up and still tried to be nice. She acted like Beast was more of her project. In the first movie, she actually acted like someone who lost everything- in the Christmas one, she was all cheery and was teaching him to ice skate.

I hate those midquels the most. In the first movie, Belle was a confident woman who didn't allow the Beast to treat her like crap - the first time he got really violent, she immediatly left him and only came back because he got hurt rescuing her life. She would have never allowed the Beast to treat her the way he did during the midquels (never mind that the midquels are screwing up the timeline)
But in fact, all the sequels are an insult - Cinderella gets a xenafication, Aurora is downright stupid, Mulan suddenly tramples over every tradition possible, Pocahontas ruins a perfect ending, Ariel's first sequel is pointless because it tells the same story again, the second creates all sorts of continuity problem (and is an insult to Triton).
The only sequel I somewhat like is Aladdin and the King of thieves - and I can life with "Jafar's return" when I see it as just a pilot to the TV-Series. Overall, Jasmine lucked out, she became a real power woman in the serie and the third movie.

"THEY MADE ME THE UNCOOL PARENT?!"

Yeah, I can see Ariel being the most insulted. Followed by Belle and Aurora.

"I don't want to end up with Rolfe!

I think she would only be insulted by "Return to the Sea"(2) because they made her too overprotective

and aurora and ariel.but mostly pocahontas.

"i was about to be killed for him and you make me to love someone else? -pocahontas

"did you really think that i wouldn't understand my daughter as my father did?-ariel

"i'm not stupid" aurora

My instinctive reaction. =P Auuuwwwrrgh!

But yeah, Ariel definitely would be insulted by #2 (which was pretty pointless--typical "child's story is the reverse of the parent's," but not executed very skillfully)--and her father by #3. And Aurora.
I'm not a fan of the Aladdin sequels, but Jasmine could be a bit less insulted by her subsequent portrayals than the aforementioned three.

The five comments right above, and others, sum it up well, lol.
I don't think Mulan would be. Cinderella...somewhat. She was especially questionable in Dreams Come True. (The Valley Girl line stands out: "This hair? EWWWUH!" Since when is she all defiant, particularly of people who think they're doing the right thing?!)

And I wouldn't put Belle near the top, either. The midquels may not be perfect, but I like them. Okay, I LOVE Enchanted Christmas. I didn't find her character to be significantly altered.

Pocahontas, definitely. TBF, I haven't seen the second one (I think it was the whole "John Smith acts like a jackass in this one" thing that set off my "This Is Gonna Suck" alarms), but I can picture that she wouldn't be too happy about what happened. Ariel and Mulan would be pretty angry as well (I love RETURN TO THE SEA and MULAN II, but you've got to admit...). Aurora and Belle would be more embarrassed for everyone involved, and Cinderella and Jasmine wouldn't mind.