When it comes to problems like that, there is no "helping" someone who doesn't decide themselves they want to change.
And the amount of calories needed daily to maintain a weight like that (barring any medical issues) is absolutely ridiculous... like 20,000+ per day. I just read an article a few days ago about the english dude who weighed 990lbs and managed to lose nearly 700 of it over the last 10 years. Back when he was at his largest he was spending $150,000/yr on food alone. Of course, being in the UK, the taxpayers footed the bill. He was eating 20 bags of doritos a day as a snack FFS. At that point, it's absolutely the fault of the people bringing in the food. And yes, he tried killing himself by taking half a bottle of codeine, which just gave him a headache the next morning because the fat cells absorbed most of it before it reached his organs.
That said, I'm down 7lbs this week. Thanks salad and Jimmy John's.