How is a human being held accountable for human weakness, given that it is Allah's creation? And does Allah accept a person's repentance, despite His knowledge of this weakness?

Allah sent prophets from among humans to be role models. They are subject to what affects humans, and their infallibility may vary. As for the rest of the accountable individuals, Allah established proofs against them, sent messengers, revealed books, and burdened them only with what they could bear. He opened the door of repentance for them, and all of this is a manifestation of His mercy, removing excuses from them. Thus, no one will find an excuse to present to Allah on the Day of Judgment, as He, the Almighty, said: "And judgment will be passed between them in truth, and it will be said, 'All praise is due to Allah, Lord of the العالمين (worlds).'" The conclusion is that no one has the right to argue, based on the infallibility of the prophets, that others are deprived of good fortune. Rather, Allah has the conclusive argument.