The top line, "Not Left. Not Right. Forward." kind of reminds me of Macron's "En Marche" ("Let's Go") that took over France in a storm, taking over the presidency AND the parliament only one year after its foundation, with very few previously known political figures in its ranks. The whole thing looked like doing management rather than politics, and offered an alternative to fed-up voters who didn't dare turn to the…
En Marche benefitted from the peculiarity of France's electoral system, which combines proportional representation in a 1st round with a "sudden death" 2nd round for the powerful presidency with only the two best-polling parties taking part. When it became clear that the far-right would be the largest single party, people ditched traditional party allegiances to back a candidate they found tolerable.
(Apologies for posting my half-mangled recollections without checking and thanks to the commenters who fixed my incorrect claims).
France's electoral system is not well-suited to its current political landscape.