Can the supplication of a young man who feels wronged reach the deceased father of the girl, and what is the solution if the father might be tormented because of it?

What was mentioned does not constitute oppression from the father towards the young man. The father is not obligated by Islamic law to accept him as a suitor, especially if his religious commitment and character are not satisfactory. The Sharia has encouraged marrying someone of good character and religious commitment, as stated in the Hadith: "If someone comes to you whose character and religious commitment you are pleased with, then marry [your daughter to] him." This is by way of recommendation, not obligation. The young man has no right to supplicate against the father because he was not wronged, and it is hoped that his supplication, if he makes one, will not be answered, as it would be a supplication involving sin. It is recommended to be dutiful to the father, whether alive or deceased.