I don't have a full list of what you've bought, but here's some comparisons for you, to give you an idea:
Cushelle Quilted Tubeless Toilet Tissue 4 pack
£4.25
(Marketed as so big they are like 6 rolls)
ASDA Shades Quilted Double Roll Toilet Tissue 4 pack
£3.55
(Marketed as so big they are like 8 rolls)
There are cheaper options available than the Asda Shades above, but this is the most comparible product. That alone would be a 65p saving on one item. Is your bottom that sensitive? Can you really tell the difference?
Frylight 1 Cal Garlic Oil Cooking Spray
190ml (92.1p/100ml)
£1.75
ASDA Sunflower Oil Spray
200ml (80.0p/100ml)
£1.60
ASDA Sunflower Oil
1l (21.5p/100ml)
£2.15
Why the fuck does anyone buy spray oil? If you bought the same quantity of the spray oil as one bottle of normal oil you'd be spending £8. Can you image buying an £8 bottle of sunflower oil??!
Is that Birds Eye 44 Chicken Nuggets with Golden Wholegrain?
695g £5.50 (£7.91/kg)
Deli Cuisine Breaded Chicken Bites
1kg £4.95(£4.95/kg)
ASDA 38 Breaded Chicken Nuggets
670g £2.75(£4.10/kg)
You are paying HOW much more?
I don't buy brands. Its just not worth it. That doesn't mean I buy the cheapest available alternative. There are a variety of levels of product. So yeah, Asda's premium range might be more expensive than its economy one, but it'll still be masses cheaper than the branded alternative. And you can't tell the difference.
Think about this on every shop and every micro shop. The difference is enormous. I genuinely don't know how anyone affords some of the branded stuff.
There's only a few things, I won't switch. Most things there are very little difference for - or if you can notice a difference you very quickly get used to it.