I think Shirley is getting a bit of a tough ride. She can be abrasive, and I don’t think she likes Emma B, but:
she wasn’t the only judge to give that rumba a low mark. Craig did also, and Motsi and Bruno only gave it a 6 (I think). Clearly it was not up to standard in anyone’s opinion, especially not for after the halfway point (the judges always get a bit harsher and ‘I expected more’ at this point, imo), and not from someone who they all expected to just be a it better than she has turned out to be.
she did start off by saying nice(ish) things. I think she was trying to say ‘I don’t really understand what went wrong - you look the part, you acted it well, you have some talent, but it didn’t come together’. Admittedly, she didn’t do it well (a mix of not liking Emma B, really being hacked off that they couldn’t even manage the basics of timings, and maybe her painkillers starting to wear off? Who knows), but it wasn’t helped by Anton chiming in and trying to shut her down. He didn’t start once she was laying into Emma, he started as she was saying the nice-ish bit. He was trying to stop her commenting further - I think he knew what was coming (namely that the timings were all off, which is crap, and that it just wasn’t up to scratch), and didn’t want to hear it (because it would show him up?). It wasn’t really the night to get into that with Shirley, I don’t think, she was clearly feeling tender and moving gingerly post surgery, and being rude and not letting her speak wasn’t a wise move.
I get that Emma B has a full schedule, but there’s a pint where that doesn’t cut it. The dances are hard to learn, if you want to do well, you need to have hours to devote to training (or have had extensive previous experience). Emma has neither, it is showing, and I do feel for her that as this year’s designated superfan she isn’t getting the experience she thought it would be - there doesn’t seem to be any friendship between her and Anton, her Eastenders schedule is putting paid to any chance she has. I think she’s feeling shortchanged and frazzled, I think Anton is feeling pissed off, for whatever reason, and it just isn’t working. It happens.