In Yellowstone Season 4, Rip (played by Cole Hauser) is initially upset with Lloyd (played by Forrie J. Smith) because he believes that Lloyd had betrayed him by working with Roarke Morris (played by Josh Holloway), a powerful businessman and longtime adversary of the Dutton family.

At the beginning of the season, Rip discovers that Lloyd has been working as a consultant for Roarke, who is planning to build a new airport in the area. This news upsets Rip because he sees Roarke as a threat to the Dutton family’s land and way of life, and he believes that Lloyd’s work with Roarke is a betrayal of their friendship.
As the season progresses, Rip’s anger toward Lloyd deepens as he becomes increasingly convinced that Lloyd is putting his own interests ahead of those of the Dutton family. For example, when Lloyd refuses to help Rip track down some stolen cattle, Rip sees this as a sign that Lloyd is no longer loyal to him.
However, it is eventually revealed that Lloyd’s work with Roarke was not as sinister as Rip initially believed. In fact, Lloyd had been working with Roarke to secure funding for a new rodeo facility, which would help to revitalize the local economy and provide new opportunities for the local community.
When Rip discovers this, he is initially skeptical, but he eventually comes to understand Lloyd’s motives and forgives him for his earlier actions. The two men are able to reconcile and continue their friendship.
Overall, Rip’s anger toward Lloyd in Yellowstone Season 4 is driven by his belief that Lloyd had betrayed him by working with Roarke, whom Rip sees as a threat to the Dutton family’s way of life. However, as the season progresses, it becomes clear that Lloyd’s actions were not as nefarious as they initially appeared, and Rip is ultimately able to forgive him and move past their differences.