Found out I️ was getting paid $13K less than someone who reported to me, had 10 years less experience than me, was generally incompetent and started at the same time as me with the same role…. Demanding a raise or immediately quitting

Extremely triggered. Luckily I’m starting a new, much better paid job after next week a reputable company. In the meantime I’m considering just quitting early after my day ends tomorrow. For context, high output Lead graphic designer running a creative team of 5 people. Handling interviews, Onboarding staff and training them… coaching people etc. So pissed. Basically asked my boss for a performance bonus as a reason to close out my tenure strong. I’d only lose $400 by quitting early and would gain a free week of vacation to mentally relax before the new job. Let’s see what happens , we are meeting tomorrow end of day to discuss this pay inequity.