How did William of Occam challenge the ideas of Saint Thomas Aquinas?

William of Occam criticized Saint Thomas Aquinas' use of metaphysics and complex reasoning in theology, advocating for a simpler and more direct approach. He promoted the principle of parsimony, known as Occam's razor, which states that among competing hypotheses, the simplest one should be preferred. This challenged Aquinas' reliance on elaborate philosophical arguments and contributed to the development of nominalism.