Here, "too much" means "too much to handle". It means "Life is too difficult for X to handle" or "Life is causing too many problems for X to deal with".I've heard of "Life is too much for X" to mean that "X is burdened with all the difficulties of life",
No. You can't just use the opposite of "much" to refer to someone who has an easy life.if I want to say that a child Y is spoiled, can I say:
Life is too less for Y.