ANSWER:
This was destined to happen as this and everything else was written 50 thousand years before the creation of the heavens and the earth.
Your attitude is very dangerous as it shows your ingratitude towards the immense blessings that Allah has bestowed upon you. Imagine if you had a baby boy who was disabled or mentally challenged and you had to live with that all your life.
Never ever be discontent with Allah’s decree as this is a trait of Satan and disobedient people.