I think she is probably jealous of Mr Carrington's TV role. She more than likely sees herself as the 'media professional' having done some radio shows etc.
I think there is very little chance of the same sort of opportunities coming her way though. Mr Carrington has a lot going for him. He's pretty talented, stylish, good looking, well spoken and has a nice sort of calm style to his presentation. Kate is just naff and cringeworthy (part of the reason she was booted off the radio I suspect), and there are plenty of other dumpy middle aged women doing hauls of tat on YouTube. She has nothing to make her stand out.
The only thing that gets her followers I think, is her house. She is lucky to have it, as she has nothing else going for her. But when you see other house accounts on Instagram, you can see that most of them have far more of a natural style and an eye for design than she does. She is just copies. And all the tat is really distracting. I mean look at her most recent post on her house account (the Christmas dinner table). The shelves in the background are absolutely rammed full of
tit!