The biggest problem I see with Trisha is the fact she is promoting the very thing that has made her obese. Trisha still equates food with having a good time, hence the great resets are needed every time she enjoys herself. She gets out walking most days but it's not something she looks forward to most of the time.
I really think working around food isn't helping her either, that's all well and good when the weight is lost but buying ingredients and cooking dishes is a recipe for binge eating.
She needs to move away from food and create new interests. Food, especially sugar is incredibly addictive and she has a very big problem with it. It's like putting an alcoholic behind a bar and asking them not to drink, it's very few that would manage it.
Trisha has sadly set herself up for failure and created a monster by her focus on food when in reality she needs to get away from it, at least until she's a healthy weight.
I've lost a lot of weight, my problems around food are all in the past. I never struggle to keep it off or count calories, drink water or worry about how many walks I get in. I put it down to a mental change, focusing on health and getting involved with the kind of activities that I actually enjoy instead of pounding the roads in frustration trying to reach some magic step number.