There are Progressives and there are Liberals, and both are Leftists. While I often disagree with Liberals, at least I can say they are rational, and I don't always disagree with them either. Progressives, on the other hand are lunatics in my opinion. I completely disagree that they have a clear vision of what they want to see changed. They are always changing their minds about what is good and what is bad. For example, when I was kid, we were taught to stop calling black people colored, or Negroes. We were supposed to call them black. Now we can't call them black anymore, now we are supposed to call them African Americans. What about Freedom of Speech. Progressives used to love Freedom of Speech. Now they say it's bad and they loved Biden's short-lived "Ministry of Truth", and they hate that Elon Musk bought Twitter. What about how awful it used to be for a male to physically intimidate a woman. I guess you don't remember Rick Santorum approaching Hilary Clinton on a debate stage, and all the flack he received from the progressives intimidating her physically. Now Progressives want men competing against women in sports to embarrass and intimidate women. Well, almost all sports. You'll never see a man competing in women's gymnastics because in that particular sport they would lose. However, I would really enjoy seeing a man on the uneven bars. I think it would be hilarious.
Bottom line is that Progressives are always changing their mind on what they are progressing to. And as G.K. Chesterton put it (I'm paraphrasing), "If you keep changing your goal, then how can you measure your progress?"