That battle seems to be lost (for now).

Actually I think that battle - or war, rather - is just getting started.

It's one thing when it happens in far-off barely European places like Greece. It's another when it's affecting you and your friends personally.

Even if the battle is won in the future, I believe that the idea of making an effort (and being directly involved in) for the community is fundamental for any society based on solidarity.

You can't legislate solidarity. Perhaps the main intellectual failing of the Left is the lack of understanding that some people want to be exploitative predators. They'll be predators under whatever political system happens to be around at the time.

If it's nominally left-wing, they'll simply use that as a cover, with a different set of narratives to the ones we have now.

Until you define predation as a recognisable set of behaviours and relationships rather than a political position it's going to be difficult to prevent this.