Why does Meiosis in human females produces only one haploid gamete rather than four?

In females, meiosis occurs in various stages. The first stage is during embryogenesis - before the 7th month of gestation. There is an arrest in meiosis at this point - at diplotene(Meiosis I). At puberty, the process continues till it reaches metaphase II. Then, at fertilization, meiosis is completed.

During gametogenesis, there is the formation of a polar body initially, when the primary oocyte gets converted into the secondary oocyte. This polar body further divides into two more polar bodies, and when the secondary oocyte divides to form the mature ovum, it gives rise to a third polar body. So we get 3 small polar bodies and only one, large, mature ovum. The polar bodies are needed post fertilization to help in the cleavage of the zygote into blastomeres, giving the ovum two poles. Like the centrioles align at the poles of a cell during spindle formation, the polar bodies seat themselves at the opposite ends of the zygote(inside the Zona pelucida) to help in cleavage of the zygote into two blastomeres.

It is evolution that is responsible for there being 3 polar bodies and one large ovum - firstly, it's the need for more cytoplasm, and then, only one ovum can be carried to term normally by the human female, and sperms are needed in the millions because they need to survive the uterine environment and make it to the ovum in significant numbers.

The irony of the situation is where a few hundred thousand sperms may reach the egg, but it's only one sperm that gets to penetrate the zona pelucida layer that is the outermost, continuous layer of the egg.
In the occasion where more than one egg gets released from the ovary, multiple pregnancies result, but that isn't normal. By default, we give birth to only one live offspring at a time, so that's just nature's rule that there should be one, large slow moving egg in the oviduct, and millions of sperms make a long, trecherous journey up the uterine cavity to fertilize that one egg, a quest in which most of them die. It is only the best, most fit sperms that make it to the end - the survival of the fittest. Nature's way of selecting the healthiest sperms to give rise to healthy, normal young.
Even in the ovary, a few eggs may mature at a time, but ONLY one is given the cue to get released during ovulation.

I hope the answer helped you out

It does create four haploid nuclei, but three of them are shed so that their cytoplasm can be retained by the remaining one.  It's basically why egg cells are so big.

It does make four cells.  Three of them are called polar bodies, and are essentially just little garbage bags to hold the extra unwanted chromosomes.  They have almost no cytoplasm.  The reason for doing this seems to be to make the egg cell as large as possible.  The larger it is, the more raw materials are there to begin the process of growing from one cell into a baby.