This scene was meant to put a spotlight on Jobs' darker side, but the event never really happened. In a fact check, this scene was specifically mentioned:
Take the movie's font scene. At an all-hands meeting, an employee dares to question Jobs’s choice of “adding pretty fonts” on the Lisa
computer, the forerunner to the Macintosh, causing Jobs to fire him
with a cinematic “Get out!” But this event didn’t actually happen. In
reality, Steve Jobs hired a typeface designer, Susan Kare, and got to
work convincing the rest of Apple’s executives that fonts were a
worthwhile way to spend their money and time. It was an act of soft
diplomacy, not a unilateral diktat.