Is the repentance of a man accepted who committed adultery with a woman, ordered her to abort twice after she got married and divorced, and then discovered that what he did was out of revenge?

You have erred by engaging in a relationship with a woman, committing adultery, and attempting to abort the pregnancy twice. You must initiate sincere repentance that expiates all sins and transforms bad deeds into good deeds, along with faith and righteous actions, as Allah Almighty says: "Except for those who repent, believe and do righteous work. For them Allah will replace their evil deeds with good. And ever is Allah Forgiving and Merciful" (25:70), and His saying: "Say, 'O My servants who have transgressed against themselves [by sinning], do not despair of the mercy of Allah. Indeed, Allah forgives all sins. Indeed, it is He who is the Forgiving, the Merciful'" (39:53). And increase your supplications for forgiveness and righteous deeds, and distance yourself from corrupt environments.