Let me just preface all this with saying "in theory". That's what this all this. But there's a lot more history to all this than what you present. I find the history on this very interesting, mostly because it kinda has become the underdog in comparison to American-libertarianism.

Saying such and such is the 'true' version of something is meaningless bullshit.

I'll agree, words change.

What you're describing is classic Marxist thought...

Not really. There are many philosophers that wrote about what is now left-libertarianism long before Marx wrote a book.

Libertarianism has much the same-ends minus the elimination of the market.

Again, no. There can still be very much a market (however, some schools of thought would eliminate this). It's all about who controls the memes of production. There can still be a market with worker controlled factories.

these two ideologies differ is in what most important value is, that being equality or liberty

Well, I think you could argue ages over whether equality == liberty. However, you're also probably thinking of the Soviet Russia and such. That's a whole other debate and name game that you can argue for ages about. And that also gets into a huge debate on what type of system brings about the most equality or liberty. Regardless, these far left libertarian ideas are not ignoring liberty by any means. You're probably thinking of the old-school authoritarian "communist" nations. That stuff sucks dick.

Both of these endgames are both batshit in their own ways and just as unrealistic and frankly I don't think either school deserves a seat at the table when discussing how the world actually works

You can have the opinion. We all got'em. But I think you're skipping over tons of ideas that have been generated. You don't have to take the whole package. You can pick off what you want if you like.