Interesting history about Cybelle and the Galli, I'd never heard it before, thanks for that. The gender fluidity of (some but not all!) polytheistic deities is always interesting to know more about, I think.
You might not be aware, since it sounds like you might be still distinctly anti-Christian, but the ancient African polytheistic religion of Yoruba has managed to synchretise with Christianity, by aligning some of its deities with Christian saints, this was done in Cuba, in response to the Cuban government's historical attempt to wipe out African cultural religion, it went underground and became something known as "Santeria", which is Yoruba kind of disguised as Christianity. So the Cubans could continue to build shrines to their Yoruban deities and wear clothing and symbols representing those, whilst to Christians they look Christian, not knowing any different, a Christian cross could be worn as the cross of Elegua / Eshu, since that deity is the spirit of the crossroads, for example, together with the colors of Elegua / Eshu, red and black. To a Santerian practitioner or follower, a person wearing a cross, with a bracelet of red and black stones, would be displaying allegiance to Eshu / Elegua, whilst to a Christian the same person is just showing allegiance to Christianity, actually both are true, it's a win-win for Santerian follwers, and Eshu / Elegua can be represented by either or both male or female humans, it doesn't matter to Yoruba, which has ancient wooden statues of Elegua in both male and female forms.
I think it's very cool to put together the positives of all religions, to give us a more satisfying view of it all, there is sense in all of them, as well as negatives as you point out, but putting them all together we start to see some common threads, very relevant to the almost supernatural events we are seeing happening right now.
I write much more about that in terms of energy as a Systems Engineer studying and writing about the global energy problem for seven years now and counting, since coming across it during PhD research.