The French league is not one of the weakest leagues in Europe, it's one of the strongest. Out of 100+ leagues, Ligue 1 is in the top 5/6. They also did a study on most successful Premier League transfers by league and Ligue 1 actually had a higher success rate than any other top league, probably due to a similar play style.
There are loads of very talented young players in the French league, pretty obviously when you look at the quality of the French national team. Todibo joined Barcelona when he was 19 and only got to play 4 times. Nice is the only club where he's had a sustained run of games and he's done well.
Also, have you actually watched him play? Because if not, it's a bit weird to say you're not feeling it.