The fans of the Halo franchise were divided on how they received Halo 4 and Halo 5. This mixed reception comes mostly from both of the games campaign and story. A handful of people say they enjoyed them, while others, not so much. Before both games, Halo titles were pretty much received with critical acclaim, with most of the criticisms drawing only from the length, or lack thereof, of the games campaign.
And then, in 2018, Halo: Infinite was announced.
Source: N4G PC HALO: Infinite Could Be A Real Game Changer For the Xbox Series X At Launch