However, looking at the major French science fiction novels published at the start of the 21st century that heavily utilized this specific style of street-slang, cyberpunk Franglais, and transhumanist jargon, your book is highly likely to be one of the following:
• Villa Vortex (2003) or Babylon Babies (1999) by Maurice G. Dantec: Dantec was the undisputed king of French cyberpunk at the turn of the century. His characters—mercenaries, hackers, and genetically modified beings—constantly spoke in a gritty, high-octane blend of French, English, and tech-slang.
• La Zone du Dehors (originally 1999, heavily revised and republished in 2007) by Alain Damasio: Set in a dystopian corporate panopticon on a moon of Saturn, this novel focuses on a revolutionary group called "La Volte." Damasio writes with an intense linguistic variety where subcultures use distinct slang to resist the control of the state, frequently remixing idioms.
• La Chromatique de Gulguth (2005) by Stéphane Beauverger: A widely praised early-2000s sci-fi novel known for its incredibly creative, stylized, and heavily rhythmic slang spoken by its characters in a gritty future world.

The phrase "c'est plus good que dead" comes from the famous 1980 French novel L'Abécédaire de la déchéance by Tony Duvert (or alternatively associated with his distinct use of Franglais and provocative language across his works).

"C’est plus good que dead" (often written "c'est plus dead que good" ) is a French slang phrase popularized by reality TV star Nabilla Benattia.