why were human created at all?

it seems when god created man, angels asked him ,why r u creating a human who will obey less and shed much blood on earth, and disobey you?

God replied, i know that which you know not,

there is always wisdom behind everything,

and he said among them will be my slaves who will sincerely worship me and obey my commandments,

he is testing all his slaves , and he will gift or punish them in this life or hereafter accordingly,

and one more point i would like to add, before a person comes into this world his soul is already existing, one may ask why is it that we do not remember?

Do you remember your early childhood memories, no right,
but u existed at that time, indeed ur soul also existed in the similiar way,