RCV is a rebrand of the voting method IRV, which was used by many cities in the early 20th century. Due to inconsistent results, it was repealed. So, unfortunately, conservatives have a leg to stand on when they attack RCV.
For clarity: their specific attacks take things to the extreme and often have some racist underpinnings, but there is a kernel of truth to attacking specifically on the method itself.
That is why I support something like STAR voting, it doesn’t suffer from many of RCV’s issues
I wish your ballot measure luck however, because at the end of the day it still is, mildly better than FPTP