Nobody is doomed unless people keep telling themselves and each other they're doomed and so do nothing. Drag whatever socialist parties and orgs there are, even in coalition with reformists if they will allow you to march under your banners and retain freedom of propaganda and criticism, because they share the same interest (for now); into throwing themselves at the contradictions between the left wing and labour. You need to split the masses off from the dead end of labour into radical organizing or at least swelling the greens ranks (as petty bourgeois will be more wont to do) and then putting a fire under the greens to compel them to fight for power (which they will be afraid to do) and show in the last analysis all of these parties are feckless and opportunist.

People need to be directly shown as well as told why they are wrong, and why we are right. And that happens in this case by forcing labour with every leverage possible into untenable positions, and propagandizing that they can't manage to do what needs done, and doing so on every front -- in and with any unions and critical labor, in and outside their meetings and conferences and conventions and campaign events, on college campuses, canvassing in communities they rely on, in votes, running candidates against them to if not win expose them, in protests against them, etc. and setting lines loudly for labour, lines everyone needs crossed but you know they can't cross, to show the masses they are a dead end. It's already happening in the US for the past 8 years with the Democrats over, well, a lot of things but most recently Palestine has been a big one causing mass defections. Communist and socialist organizing and defections from dead end neoliberal parties is only growing.

Show the masses who still ride labour why labour will never be able to fulfill the will of the conscious workers by agitating openly under your banners against the things you know labour can't do due to their interest but which the poor working masses want and need; in coalition with other left parties and reformist parties if necessary while maintaining freedom of propaganda and criticism. Look at everything as a whole, where the masses are and their class representation, and where they are locked up on what issues, and formulate a line of attack based on the current reality and state of thing now --- not as they have been or might be, but as they currently are in living reality. How can you foment a separation of masses where they are stuck, and mobilize masses who are not stuck but lost in how to advocate what they want and need. And these things feed into each other as more on every side see you doing this under our banners.