The people relentlessly bashing Killzone and defending Concord are missing the point.
Multiplayer, single player (even if it is MP footage), its the attention to detail that is absolutely lacking and fucking sucks about a lot of modern games. Imo, you want an even better comparison as to how dogshit and boring Concord is, look at Team Fortress 2, which is a 2007 game which still holds a larger playercount than Concord ever will. It has an iconic stylized art style, maps loaded to the brim with small cute details and intricate map layouts, a cast that is perfectly designed and balanced for casual, fun play, and all sort of rock/paper/scissor dynamics that make it a game that people still play today. The gunplay is still loads of fun too. Meanwhile, Concord is just more derivate dogpuke made by people who took video game classes to artificially create a professional video game career, instead of visionaries and talented individuals who made games out of passion.