I have to drop this one, I am sorry to say. Everything about the FL is such a huge red flag and I just don't watch…
Actually rather than toxic behaviour.... In China there is a concept about personalities of women in particular regions.....And North eastern women are depicted as hot tempered, outspoken and strong willed. The female lead depicts a character from this region.
Other regions have some notions about the personalitites of their women.
K-Drama 
Other regions have some notions about the personalitites of their women.
You can see over here explaining it
https://youtube.com/shorts/k9BifaJ9Fzs?si=wqGchf3zYkjonEIA