I think you must be incredibly mistaken. Greece kind of treated their women like shit in some places (fucking Athens), but the Roman empire was exceedingly good to women in a number of ways. They were far more free there than they have ever been under any form of Christianity. The type of marriage that demanded submission to the will of one's husband in all matters (manus) and gave him ownership of all her property/inheritance and total dominion over her legally, had died out by the second century BC. They could own property, access courts without a male to speak on their behalf if they wished, were entitled to an equal split of inheritance (no favoritism for sons) when their fathers died, and their property remained completely separate from that of their husband's. There were a number of ways for them to prevent their husbands from gaining legal dominion over them. They could obtain divorces, eventually simply on the grounds that they wanted one, and when they did so it was customary for a husband to return most or all of her dowry. Divorce didn't make one a pariah in society. Women were praised for being educated, because it meant that they could raise educated children as well. Women were not just allowed to work, but kind of expected to do
something. Nobody was lauding them for sitting around doing dick-all with their lives, and just as with any other place and time, I doubt that was particularly practical for most. All of this was established pretty early on, most of it either BC or within the first 200 years AD. They couldn't vote or be involved in the Senate, but in other areas, things weren't so bad. I'm sure things shifted when Western Rome fell and Eastern Rome/the Byzantine empire became the center of power, but for a while, Rome treated its women better than the bible and Christianity really ever do.
Oh, and there were some women who chose who they wanted to marry for various reasons, but marriage was not viewed by the ancient Romans (or Greeks) necessarily as a relationship built on love. It was often (maybe mostly) people joining together for convenience, status, money, or power. The Greeks tended to find companionship with concubines and other women outside the marriage. The concept of marriage in Christianity is a completely different sort of agreement.
Here's what I know about Christian history: women in leadership positions has always been a contentious subject in Christianity. As early as 150ish AD (I think), you had people like Tertullian challenging women's rights to do things like baptize and teach. It's written into the bible that they are not to hold positions over men in the church. Women were only respected in the church to any degree for maybe as long as it took to get established as a ruling religion, and then rest of the men who supported them pretty much turned on them. They purposely obscured the involvement of women in any portion of Christianity, and in any role of leadership. Christ is not depicted as having any female apostles, although Mary Magdalene and a woman named Junia very well may have been. Mary Magdalene may have been an important teacher, apostle, and prophet, but she was instead conflated with the (different and separate) sinner who washed Jesus' feet and dried them with her hair. She was downgraded to a repentant whore. Junia's name was mistranslated to Junias, the male version of her name, because it was assumed that no women could have held that status. From what I understand, scholars now argue that she was indeed female, but her status as an apostle is questionable due to wording. Gee, I wonder why. I wonder why someone like Thecla, who was second in popularity only to Jesus' mother Mary, is a relative fucking unknown in our day and age. The stories of this woman are relegated to the apocryphal books of the bible now. When Protestantism came along, Mary herself got a lovely downgrade from a figure of great reverence to just some chick. Even the minds behind the reformation of the church saw women as nothing more than broodmares. Luther made comments about women's only purpose being to bear children, and how they should just do that until they were worn out.
And yes, Jesus' death erased the hereditary sin of Adam. It's a Catholic tenet; I just forget the silly Protestants decided to define it as something else for some arbitrary reason, as with everything else related to Christianity. That's another thing I can't stand about Christianity. When people don't like the interpretation or definition of something, or they feel that perhaps they need to adapt/update the bible in some way, they just break off and make a new sect. There are a zillion and five different Protestant religions. It's hard to get all the details right in a discussion with someone, because the details are different depending on who you speak to.
I don't know where you're getting this figure of a thousand years of woman power, either. Papal supremacy was established in the 400s. There is no female clergy in the Catholic church or the eastern orthodox variety. There was no clergy in the Anglican church until 1944. As you can see from
this list of Protestant sects, no women were ordained prior to the 1800s if the religion ever allowed it. Many have not. I don't get it. Where are all these positions of leadership and power? Being a nun or belonging to some similar celibate prayer society is not a position of power or influence within Christianity. Maybe what you meant to say is that women are allowed to die for their religion, and women are sometimes elevated to a saintly status post-martyrdom, but they certainly are not historically leaders or figures with power and voice in this community.
The bible is full of messages that women are inferior and should shut the fuck up, and (male) leaders over the course of time have agreed:
http://www.religioustolerance.org/lfe_bibl.htm
Also, the language used to describe how women should behave toward their husbands differs from how husbands are expected to treat their wives. The bible openly calls women the weaker partner, and I don't know if you're purposely being obtuse here, but the brain rules the body. Christ rules the church. The husband rules his wife and she is expected to submit to him as the church does to Christ. I'm not exactly sure how that's
not blatantly just outright saying, do as your husband commands.