I used to judge fat people as being lazy pieces of $hit who had no will power. However as an addict myself (food isn't my "drug" of choice but that's besides the point) there is clearly some mental or emotional issues here.
As with all addictions people use it to cope with something they aren't addressing. Some use alcohol, work, sex, cocaine, etc. Some use food. TS needs to figure out the underlying issues of WHY he feels the need to eat so much food otherwise no diet in the world is gonna work.
Good luck