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Hello,

This is an excerpt of a translation exercise.Can you please help me with the words is blue? If you see some mistake please warn me. Thank you. I haven't checked the name in the beginning so sorry for wrong spelling.

Siziphus himself, would have already given up, but not you. Moreover, the adultury will become a secret code, the system of signs that will keep you two together in this labyrinth of your relationship, in the bitter delights/passion, rough pleasure, pure paradoxes. Together you will go through alchemical phase of mutation of your marriage from something into nothing, from marriage into trick, shuddering from thrill because it is all an illusion, fantatsy, day dreaming.
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Hello Antonia

In addition to Nef's comments, maybe:

"Sisyphus himself would already have given up, but not you. Moreover, the adultery will become a secret code, the system of signs that will keep you two together in this labyrinth of your relationship, in its bitter passion, its rough pleasure, its pure paradox. Together you will go through the alchemical phase of mutation of your marriage from something into nothing, from marriage into trickery, shuddering from the thrill because it is all an illusion, a fantasy, a daydream."

MrP
Comments  
Siziphus himself, would have already given up, but not you. Moreover, the adultury will become a secret code, the system of signs that will keep you two together in this labyrinth of your relationship, in the bitter delights/passion, rough pleasure, pure paradoxes. Together you will go through alchemical phase of mutation of your marriage from something into nothing, from marriage into trick, shuddering from thrill because it is all an illusion, fantatsy, day dreaming.

Siziphus himself - even the most persistent person (or anybody else in the world)

In Greek mythology, Sisyphus was a man the gods punished. They assigned him the job of rolling a large rock up to the top of a mountain. Moreover, they arranged things so that, just when he succeeded in getting the rock almost to the top, the rock would roll down again. This supposedly went on for eternity, since he never was able to get the rock to stay at the top of the mountain!

delights/passion - joys/very strong, intense feelings

alchemical - dramatically transformative, changing

(typos: adultery, fantasy)

This isn't easy reading, even for someone who learned English as a first language. More power to you!
Students: Are you brave enough to let our tutors analyse your pronunciation?
 MrPedantic's reply was promoted to an answer.
Thank you both, you've helped me a lot.