I'm glad to help! Here's a revised version of your text with improved clarity and coherence:
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"What have you done?" The hunchbacked old man shouted at the second youngest man in the room, who was visibly shaking, sweat rolling down his face.
"It... it... was him. He put me up to this, saying Uche hadn't bled once since he started this job. He told me to do this," the second youngest man stammered, pointing at one of the middle-aged men operating the large circular saw.
"Idiot! I only asked for a way to injure him so he could bleed. After all, he's the only one who hasn't gotten any wounds since starting this job, but you've gone too far," the middle-aged man argued, a hint of worry on his face.
