It sounds as though you've been sucked in by the spinmasters on sugar. If you can point me to a double blind, randomised, controlled trial which demonstrates that fructose disturbs the hypothalamus, I'd like to read it.
There is no particular food which, if avoided, will guarantee the maintenance of a healthy weight.
Imo far too many people eat far too much carbohydrate. The obesity epidemic began around the time nutritionists came out in force saying all carbs are good - eat as much as you like - you won't gain weight.
Absolute rubbish. The greedy, undisciplined masses jumped on the opportunity to chomp down massive bowls of pasta, eight slices of bread per day, potatoes every which way etc., and then wondered why they got fat.
Focus on fresh, unprocessed foods, simply cooked, avoid too much carbohydrate, and have moderate levels of healthy fat, and a bit of animal fat such as butter and cream to provide great texture and flavour, along with small amounts of protein daily.