The dance could have been better, but they had absolutely no chemistry and with Latin showing or acting like you have chemistry with your partner is quite a big part of it.
i think Dianne let the trolls get to her, the trolls and Strictly curse questions started before Strictly even began. She slammed down on Twitter, insta and interviews, but some of the comments have gotten very nasty and personal in the past fortnight. That it has taken its toll.
She clearly choreographed the routine so that there were as few sexy moments as possible and that with the song choice made the dance forgettable. Dev can get into character, but was stopping himself as maybe he didn't want Dianne to feel uncomfortable. He was getting it in the neck from trolls and minions too, especially after he dropped her last week.
Honestly it's not just the trolls, the minions need to stop being so obsessive, can they not see how much trouble they are causing, she is supposed to be their "idol" and yet the way they went after Dev for the fall and when he was first partnered with him, where going off how they didn't like him and how he would ruin the Joanne relationship (Brand).
Dianne gave into the pressure she is getting from all sides and ended up making a mediocre routine, which meant normal Strictly voters didn't vote for them. If it is true that she got extremely upset when eliminated, it's most likely she blames herself as she let the internet and the public influence her and felt she let Dev down because of it. Maybe she should take a break from SM for awhile and get her head back in the right place.
As for her brother, he needs to grow up, he is on the other side of the world and is making his sister look bad with comments like that. Don't think Dianne will be too appreciative of it.