>>18113976
You are referring to the Masoretic text which was written by Jews, in the 10th century. In it, it is masculine

The most accurate translation is actually "it" but some Eartly church fathers had no qualms with either feminine or masculine

The Catholic Church uses a feminine word to emphasize Mary's role as the conduit that led to the salvation of Man
Yes, Jesus was the one who crushed the serpent but he is also God.
Mary is unique because she is just a woman and yet, she was able to completely reject the devil