EDITED - (this changed a bit while I replied but I don't like to delete things as I find it confusing later but needless thanks for expanding a bit and making it more clear that people did work for change and continue to)
who gave up? As far as the canidate in one primary we went forward but that was the start of a lot of momentum in primaries for progressive candidates. Every time I see something about giving up it feels so disingenuous to those who while working within the system still try to change it.