You do not exist for you.
you were not made for you.
You were made as a means to an end. Namely your DNA made you to make more dna.
Thats it. That is as deep as life goes. That is the alpha and the omega.
Life is not nice to the individual. It doesn't care if you're happy, sad, hungry, full. Whatever gets the dna spread is what it uses.
Something goes horribly wrong? So what. The individual is meaningless to DNA. evolution is a system where "something went wrong, so you live only to know pain and death" is a feature.
Lifes "plan" for you is to keep cranking out babies. If that encourages you to cheat, stay with an abusive spouse, or to get into a relationship you're going to regret, doesn't matter.
To make matters worse, the plan is made with million year old assumptions. DNA does not change nearly as fast as society. As far as the DNA is concerned, its cranking out a machine to survive in a hunter gatherer tribe slash extended family with spears and clubs.
If that sounds like a bad way to live in a world of nuclear weapons,internet nation states and individual rights... you're right. Its one thing when the sociopathic indifference to non relatives has you invade the next tribe over, kill the men and rape the women. It becomes something entirely different when the people in charge of deciding to attack don't actually have to face the slings and arrows themselves.