First off sorry for the tone of my previous post, that was completely uncalled-for. It's just the effect Macron has on me.
The policies that Macron helped enact as Minister of the Economy, Industry and Digital Affairs aren't exactly the ones that are the source of Hollande's unpopularity.
What makes you say that? I mean, we can discuss for years about the reasons of Hollande's unpopularity (when your approval % is lower than the legal age to vote, you must have screwed up more than one thing), but it's pretty clear that the reason why he's become so unpopular
among the left is that he betrayed the entire economic program on which he ran and ended up doubling down on neoliberal voodoo economics, with tax breaks for corporations, tax hikes for the middle class (through the VAT), deregulation of the labor market, etc. There's a reason Hamon kicked Valls' ass in the primary last month: it was a rejection exactly of all the policies that the Hollande/Valls/Macron unholy trinity championed. (Hollande himself has made hints that he really supports Macron, even though he can't say so in public.)
Hollande's 2012 platform was full of symbolic, feel-good measures rehashed from the French left's past or from the fads of the moment, intended as a synthesis of different currents of the PS electorate. Hamon's platform proposes a genuinely bold new vision to fundamentally transform French society in a more egalitarian direction (UBI, taxing the means of production, sharing work-hours...).
Since I just answered that, I'd like to know what the hell you find promising in Macron's proposal of tripling-down on neoliberalism except with a younger and more "hip" face.