CLKD!!!! You don't especially need to check your ingredients for hidden sugars in your diet yet - as this is likely to be minimal compared to the amount you are pouring directly into your drinks! No wonder you feel shaky etc and get low blood sugar! Looks like you are adding at least 6 teaspoons of sugar to your tea on top of what you are taking into your diet, adding to grapefruit etc If anything is likely to upset your blood sugar metabolism, and cause fluctuation in sugar levels this is! If you cut out all of this added sugar (and then also look for what hidden sugars there are in your diet) your body will thank you for it because you will stop getting spikes of sugar, insulin surges, and then crashes as the sugar runs out!!!! You are also eating a lot of refined carbs/sugars in the first part of the day which will only exacerbate the effect (spike of sugar then crash as you run out of energy....)

I agree as Ju Ju says if you have insulin resistance it's best initially to limit all sugar including fruit sugar, and to cut out fruit juice, until you've sorted out your insulin levels. If you don't then I'm sure it's OK to have plenty of fruit - the Slimming World diet allows unlimited fresh fruit of most types.
The only way to cut out any (most) added sugar is to completely avoid all processed foods including pasta sauces and soups. Once you've stopped adding any sugar for a while all these bought things - even supposedly delicious Covent Garden soups - taste horrible to me, because they've got too much sugar in and that's all you can taste. I usually make my own soup but used to buy I a few of the tasty cartons for when I'd run out - but I don't think I found a single one that didn't have sugar in it!
In my case - I eat almost no processed foods, very little sugar, low fat, hardly ever have cakes, biscuits, puddings or sweets (maybe once or twice a week I'll have something in that category) do 3 exercise classes a week and I'm still not losing any weight and struggle to maintain the same weight

Yes I agree bananas are good - I have one cut up in my porridge most mornings!
Hurdity x