Looks like the common story. Porn industry is literally built out of vice and sin (not complaining, just facts), entertainment of the lowest order, strong personalities survive, the weak... well, the weak do what the weak do, substance abuse, bad relationships, and other shitty life choices. 'Blacked' just exploits the desperate who live their bad choices, much like those who view 'blacked' content.
Most pornstars either have short careers and escape, or escape permanently.