One of the most incorrect yet common takes on Bianca di Angelo is that she should have gone to CHB and made sure it was ok for Nico before leaving with the Hunters.
I'm sorry, did you not read TTC properly? You need to go back and reread it if you think that this is true.
Artemis only told her hunters that they would stay longer at CHB after Bianca became a Hunter.
Bianca did not know that the Hunters were planning to stay at CHB. In her POV, she could either join the Hunters or stay with Nico and not get a second chance at joining what could possibly be a chance for freedom (in her POV).
Bianca did not know that the Hunters would stay at CHB until after she became one. She was scared of losing her only chance at freedom (in her thoughts) and made a rash decision. Stop blaming her for it. And stop with this moronic take. Please stop it.