All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
No matter how great the sin is, the Pardon of Allah is greater, and His Mercy encompasses everything. So, do not think bad of Allah and turn to Him sincerely and truthfully.
If you sincerely repent and regret what you have done, then your repentance will wipe out the previous sins. A person who repents from sin is like a person who has not sinned.
Hence, you must have hope in the Mercy of Allah and you should know that His Mercy is vast, and His Grace and Favor are immense.
You should not despair of His Mercy, and your repentance is a sincere repentance even if you did not cry. As long as you have regretted what you have done, then your repentance is true – Allah willing.
However, we did not understand what you meant by saying: "How should I react to the story of Pharaoh and blasphemers of the Prophet.”
For more benefit, please refer to Fataawa 393127, 388126, 384538, 356689, and 174507.
Allah knows best.