Now I'm all in favor of meaningful talk on deen even though admittedly polygyny is such a small part of Islam and Muslim society at this point particularly in the west. I want to make this a bit of a safespace where all sides can discuss their perspective because on male oriented subreddits all we see is the same old facetious advocacy and sisters vehemently opposing it. Now me personally, I don't want it. Goes without saying most of us agree it isn't what we desire. The whole idea of having to share is just... yeah.
However from a holistic and unbiased perspective I'm inclined to agree that polygyny is by far the preferred spousal system in Islam. Not only were all the sahaba and the Prophet polygynous, but so too were practically all Muslim men of note historically until colonial invasion. There's quite a lot more to unpack there but having multiple wives signified not just status but also one's ability to care for multiple women and families. In particular, this hadith stuck out to me
It was narrated that Sa’eed ibn Jubayr said: Ibn ‘Abbaas said to me: “Have you gotten married?” I said: “No.” He said: “Get married, for the best of this ummah are the ones with the most wives.” Narrated by al-Bukhaari (5069).
Most of us enjoy the prospect of being the pride and valuable part of our husbands' lives, and there certainly is a contrast to note between a man who has more than one and a man who only has one. I'd much prefer being with the latter, but the former is a man who is probably more rewarded and perhaps more desirable. I think most opposition comes from the consequences of the unknown as to how the dynamics themselves would work as well as general insecurity that accompanies.
Do take time to voice your opinions too however. I understand, this is a place for discussion and I'm absolutely open to being convinced otherwise. This is by no means a rock I'd die on and would love to be proven wrong or corroborated either way. Anything to avoid the toxicity of lustful and laughably single men disparaging us either way.