Why is Kevin Costner Leaving Yellowstone?

Kevin Costner is one of the biggest names in Hollywood and his career only flourishes as years go by. That being said, we cannot deny the positive impact that Yellowstone had on Costner's success over the past few years, as he basically has entered a renaissance period in his career thanks to the show. He even won a Golden Globe recently, which is the highest achievement any TV actor can get. Then, why has he decided to leave the show behind? Is he sick of Yellowstone or acting in general?
What are your thoughts on Costner leaving the series? Let us know what you think in the comments below!
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