(CNN) Formula One world champion Lewis Hamilton wrote he feels like "giving up on everything" in a series of emotional messages on his social media account Tuesday.

The Mercedes driver, who leads this season's title race as he chases a sixth world crown, labeled the world "a mess" before encouraging people to go vegan in his Instagram story , which is no longer available to view.

"Honestly, I feel like giving up on everything. Shut down completely. Why bother when the world is such a mess and people don't seem to care," he wrote to his 13.1 million followers.

"I'm going to take a moment away to gather my thoughts. Thank you to those of you who do give a damn about the world."

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