Is atonement permissible for one who invoked upon herself deprivation from marriage in a moment of anger, and can she supplicate for the opposite of that, and is there hope for marriage after what happened?

We hope, by Allah the Almighty's mercy, that He does not answer this supplication you made against yourself. There is no expiation for you for what has occurred. You should frequently supplicate for yourself for good and a righteous spouse, maintain good thoughts about Allah the Almighty, and have trust in His generosity and benevolence.