I am 25 years old, but my parents don’t let me go out, work, or make friends. What should I do? No matter what I say, it doesn't work, and they threaten me with death.

This is excessive doting. Although they think they love you, they are actually harming you. Your parents cannot stay with you all your life. You will have a separate life and your own offspring in the future. They need to be taken care of. Limiting your ability to live in this way will only make it more tiring and difficult for you in the future. Reason with them carefully, and don't rush for their consent to be reformed slowly