he also posted that the rest of his life is a mess.
Again fishing for sympathy and attention
I'd say it is mess and has been for years. The compulsive lifting, drug taking, hours spent posing are a metaphor for control.
He cannot control the direction of his life but at least he can control this.
Same thing behind the need for constant external validation. If you are useful to noone and your peers have long since surpassed you in life, you've lost all internal sources of confidence