Because she is so controlling (think how Ali couldn't show any rooms until Lydia showed them), it stands out even harder that she stole Ali's thunder with the honey harvest. This is his endeavor and accomplishment. She scoffed at him, eyerolled his earnestness during the bee schooling he underwent, and then swoops in and shows the resulting harvest on her channel first.
Sitting down and going point, by miserably long drawn out point, over what she is doing to get herself, her wardrobe, her house fragrance, candles, her house, etc. etc. switched for Autumn is the biggest show yet of how little she has going on. Soz Lydia, you've been left behind by your peers in a MAJOR way.
Admits she didn't know who Dobby was. She's not a Harry Potter fan. Said she googled when someone said Berkeley looked like Dobby. Then proceeds to call Dobby a gargoyle. He was a house elf, you idiot. Like Ali is. If she'd actually read anything about the character she'd know that.
Her willful ignorance over even the most mundane things is staggering. She waxes on authoritatively about colours, fashion and decor, yet there is no substance at all. No amount of pointy toed flats and long feminine dresses undoes her ill-mannered roots. Perhaps this trope of silliness was celebrated in times past, but these days knowledge and manners is a true currency. It's the one thing that comes close to leveling the field in class, IMO.
I've been around old money. Their manners are impeccable usually. They're admittedly quite casual. After all, their crises are not the same as for every day people. For example, an unexpected large appliance breaking down can mean the difference between being in debt for ages or not for many people. There is an undeniable ease that comes from never having to worry about money. (I realize health concerns affect everyone, rich or poor, but you get my point I hope.) I've also met people born in abject poverty, having grown up with dirt floors, etc. who had impeccable manners and enough curiosity for life that they continually sought out knowledge and thusly elevated themselves out of their origins. In the end, it would be hard to tell them apart unless the one from abject poverty told you their story. That is what Lydia misses. Layering on labels and driving luxury cars falls flat when her brain is empty by choice and she has zero manners and no grasp of basic etiquette.
Lydia is a constant bulldozer trying to appear upper class, yet misses the simplest of things. She has not evolved one bit. Week in and week out she brags about how much she's grown and evolved, yet she is still the same shitpuffin in galaxy leggings and Lita booties at heart, easily slipping into vulgarity and open avarice. Cackling away and bullying those she deems beneath her, which seems to be every single person around her.