French salaries for senior developers are less than entry level developers in the US.
I have bootcamp students with 6 months of software development experience making more than top developers in France, lol. The few extra Euros you get for being on call hardly seems worth it.
There's a reason French workers are almost always rioting. Low pay and very few opportunities.
The question on whether it's abusive or not very obviously depends on the details. Yes, lol, I am actually willing to accept $250k per year, unlimited time off that I use upwards of 6 weeks per year of, full benefits, working from home, in the event my boss needs to call me once a year on a Saturday.
Sweeping generalizations are not helpful, and will likely hold you back in your career. You should evaluate things on their own merits.