At least 20% of French people express capitalism-hostile opinions (and it goes well beyond Mélenchon voters). You face hostility as soon as you make money, with consequences ranging from being denied places in the kindergarten to the "petit Gregory" affair where the 5 years old son of a newly promoted team leader was drowned. I'm trying to show off as much as I can that I'm sponsoring poverty, donating a lot, making a lot for minorities, etc, because truth is, I'm afraid of getting mugged. People who criticize me, talking as if I belonged to the group of tax evaders, themselves don't have a clean business and evade taxes just as much as Greek citizen, so don't expect any rationality in their despicable criticism. Things can be so simple as, if you don't buy locally-grown groceries, you deserve to be told off in public for not helping the local population.
If you belong to the Christian minority, expect to be harassed by those you say "We need to respect all religions". Everyday you'll face jokes like "priests rape kids, followers are stuck-up, donating is worse than sponsoring a mafia".
President Macron himself is seen as a capitalist enemy by those 20-50%, and this Mélenchon group explicitly denies his legitimacy. There are currently very active groups and many of my friends are preparing the ground on Facebook (God knows what kind of riots they're preparing for September – you think I'm kidding? wait and watch).
French people are entirely hostile to privately-owned companies and average-wealthy managers, so, no, I wouldn't recommend my country for entrepreneurs, not until they make peace with a reasonable dose of capitslism. And that's where I have hope for Macron: If he does the right things, he may tame anti-capitalism sentiments a bit and show that hard works does bring money.