Despite his expectations, the late Matthew Perry was unhappy even while filming Friends. The sitcom ran from 1994 to 2004 and became a massive part of pop culture. It won multiple Emmy Awards, a Golden Globe, and nearly a dozen People's Choice Awards. Perry was attached to the show and played the notorious Chandler Bing. Tragically, Perry died on October 28, and investigators have since attributed his death to ketamine usage.
https://screenrant.com/friends-show-matthew-perry-george-clooney/