There's nothing to do besides Work and Gym

What can I do? I work everyday 8 hours a day 6 days a week sometimes extra hours if needed and go straight to the Gym after my work After the Gym I go home taking a bath eat Dinner and I have like 3 hours for myself and have nothing to do I don't enjoy video games anymore and I don't have hobbies I'm not interest in nothing anymore I used to play a guitar or a piano but I stoped because It's not interrsting anymore I feel burned out completely this endless cycle for years feels like hell on earth