he’s not wrong, any coalition of the left would be a rag-tag collection that would fall apart in no time and do more harm to their ideas than good. also, they have been caught on the hop as nobody predicted the swing to the left so they are totally unprepared for gov even if the numbers were there. better off to build a proper left with another term in opposition now that it has been proven that left represents the mainstream and is not just a few dogmatists shouting in protest.
The other option is the ff-sf-green coalition which could literally work out anyway. into the unknown.