The left are rioting because they got bupkis. They got the most seats, but are well short of a majority. Macron’s center right and the right have almost 60% of the seats.
https://apnews.com/live/france-election-results-updates-round-2-macron-le-pen
[Here’s a look at the final results from the second round. According to the Interior Ministry, the leftist coalition has taken the most seats in parliament, with at least 181. Macron’s centrists have more than 160 seats. Marine Le Pen’s far-right National Rally have 143 seats after leading in the first round.]
It’s a victory without the power to make policy.