Furthermore, the essay is not attacking the left as a whole, not even all the parties within the New Popular Front coalition. The writer is attacking Melenchon and his LFI. I have seen several interviews with leaders of, for example, the Greens over the course of the campaign who have insisted that Melenchon does not speak for them and they do not see him as the leader of their bloc, even if the media like to portray him as such.
Nonetheless. LFI s clearly the senior party in the coalition and Melenchon its best known, most charismatic, and most controversial, figure. To what extent he woll be able to dominate the new National Assembly is very much an open question.