Okay this made me laugh so here's a bit of tea that shouldn't give anyone's identity away! (Yes I realise I am now just like Jack saying I'm not sticking around and then, in fact, sticking around.)
Re. DKL - Yep, Matt couldn't stand her once they started working together, but he wasn't even keen on the idea to start with. Another SK regular who is friends with Matt (but who wasn't on DKL) complained and said Jack's whole thing felt 'off', but for whatever reason the producers went ahead with the choice. It caused them a major headache - she was specifically asked to stop picking arguments on social media but ignored them. It also wound the crew up that she'd claim the show and prep was taking her ludicrous hours every day, which made them look like they were breaking all sorts of rules. Obviously it was nothing like the hours she claimed. Source said (verified on Twitter, but sent this by DM early hours of a Saturday morning so I suspect they may have regretted it!) that it was made very clear to Jack that she wasn't doing the prep she should and wasn't behaving in a professional manner but she ignored it. Their theory is that she must have known there was no chance of the production crew or Matt wanting to work with her again, but she chose to spin it as a big success on social media. In terms of industry insiders calling her out - one publisher has been speaking out against her for years after they asked her to contribute a recipe for a charity cookbook. Jack said yes then ignored all further contact, until finally the publisher got back a response along the lines of Jack's Kickstarter and Patreon excuses, e.g. please stop hassling me it's very bad for my mental health, I've had a very hard time etc. There was also some incident I don't know the details of with a BBC Good Food demo and they now won't touch her for anything live. Oh and also a photographer who worked with Jack on a few different media things said she'd have a new designer something every time they saw her and it was always 'oh a friend treated me' or 'I bought this with my book advance' etc.
Oh finally someone who Jack seems to think is her pal on Twitter used to contact me all the time about her and wanted to help me to create a podcast. It almost makes me feel bad for her when I see her interact with them.
I will obviously sell out anyone's and everyone's confidentiality if anyone can dish the truth about Dordrecht.