Why do you keep trying Keto? Lack of carbs leads to that Keto flu thing - feeling awful. You are stressing your body by doing Keto right now and every time you bounce in and out of Ketosis you're going through withdrawals again.
Why don't you just eat reasonable food at reasonable levels? A high(er) carb nutrition plan is recommended in almost every detox protocol.
Keto can come later. You're trying to get off (added?) sugar, and that's a great goal but why not continue to eat fruits and vegetables and grains and dairy until you are stable emotionally and physically?
I'm at a healthy weight and eat a lot of carbs. I need them for my sense of well-being. I don't have to eat all the treats every day, but I allow a few per week...