Hick's law and the paradox of choice explain downsides of having many choices. There is also a model that explains the downside of making many decisions in a limited period: decision fatigue. As you make more and more decisions, you get fatigued, leading to a worsening of decision quality. After taking a mental break, you effectively reset and start making higher-quality decisions again.
Chapter:
Anything That Can Go Wrong, Will
Section:
Too Much Of A Good Thing