Charlie is just a male version of Lydia. The same narcissistic, snobbish, bullying behaviour. The way he talks down to Josie, corrects and belittles her, it's sickening to watch. It's even worse than with L&A because at least Lydia tries to masquerade it as banter.
I'd been following her for quite some time before I got tired of it all, I remember her hiding Tesco grocery bags from him, him agressively snapping at her when she jokingly pointed out he was copying her photos (her Dubai vlog, towards the end, have a look), her casually mentioning how they fight all the time... It seems she just got used to it. Like Ali.
That's why they will never fall out over these two POS flirting. Josie wouldn't dare and neither would Ali.