You talk too much.The tearing at the armor was starting to annoy Victor but when the suits arm came off his actual arm almost came with it and the suit started overheating prompting Victor to scream in agony - the Burn Cycle was initially for the suit but vented through the sword so now Saber itself was heating up and with the arm gone he was sustaining burns so he had no choice.
He deactivated the Burn Cycle and set the off his distress signal to SHIELD. With the remaining arm of the suit he cocked back hoping to knock back Venom. But the suit was at critically low power following the Burn Cycle and the suit shut down leaving Victor at the monster's mercy. All he could do was hope for a miracle or a quick death at this point.