I just watched it. I thought it was very good but I didn't feel that it fully got across "the face of BPD", not the face we have all seen anyway. I think it also portrayed the fairy tale happy ending we have all longed for. I think it was a bit dangerous for me to have watched as I am only a month out (again) and struggling on a daily basis.
It's not in the public's best interest to describe every little detail of his personal life - you don't want to start any witch hunts and reinforce the stigma of BPD, especially with an audience that large. But as someone else said, Cutler's comments, his wife's/mother's comments... .They dropped multiple hints that it got pretty ugly at times. That's the most you can do on NFL Network.
The success story is a dangerous fantasy to play into, but many circumstances factored into the treatement of Brandon actually being successful. A lot of pwBPD's described on this site are everyday folk, and if they fail to turn things around, it's not like they're going to lose out on an NFL career worth upwards of $40,000,000. I mean, as much as pwBPD will try to twist things around after a failed relationship/friendship to make it seem as if they were in the right and everyone's out to get them, when the entire country knows you as a fairly gifted professional athlete, it's much easier to attempt to get help, rather than deal with the infinite questions about "why did you walk away?"
Playing for the Dolphins probably helped a bunch too. The teammate who advised him to go back to counseling, Ricky Williams, has his own "life story" available on YouTube, and it's basically "Ricky deals with his problems by quitting football and smoking weed in a shack." This probably played a major part. Brandon knew what happened to Ricky and didn't want to be like that.
https://www.youtube.com/watch?v=cuqtIlpaO1M