The Sense and Syntax of Qāsā

Seven Semantic Properties of Form III (Mufāʿalah): Participation, Equivalence, Causing a State, and Independent Uses

قَاسَى زَيْدٌ هٰذِهِ الشِّدَّةَ
Translation: Zayd endured this hardship.
Qāsā is an active past verb; Zaydun is the nominative subject; hādhihi functions as the object in the accusative position; al-shiddata is a following accusative apposition/clarification.
The sentence expresses one person's experience of suffering, not an action exchanged between two agents.