Yup it must be that simple right? Because humans aren't complex. There's one single cause and one single solution to any problem.At his time with BHA he was a young man, an overnight minor celeb, with money in his pocket, a lot of spare time, and an entourage of hangers-on. He liked a drink and he liked to party. He had the time, the money, and the inclination, and (crucially) also lacked the maturity and discipline a professional athlete needs to stay at the top. He just stopped working. He himself has admitted this.
Your theory that NSC/Instagram/Twitter DROVE him to almost drinking his career away is frankly ridiculous. Just accept your thesis turned out to be off-track. He liked the party and nightclub lifestyle, got a taste for it, and discovered you can't burn the candle at both ends without buggering up your own career.
Thats it.
One single factor playing a role in every single thing. All the dynamics in everyones life are as simple, black and white as you describe them.