I thought Carina handled herself beautifully at dinner to Jaime, balanced and with integrity. It was just shame to see the self doubt afterwards. Jaime really showed herself up.
Besides Lauren's behaviour, which was odd but I would guess partly maladaptive coping, Carina and Rhi are allowed a different opinion to Jaime without being shouted down, threats and manipulation. I also thought she was very quick to cause trouble for Veronica when she questioned Jaime.
For me it's not that Lauren was right in any way, but she was easily overlookable. It was clearly a 'her' problem. Jaime was spoiling for a fight and was far more deeply and structuredly unpleasant than calling a few people bogans or trolls.