Hi Chloe,
you are not alone.....far from it.
I set up my shop because i couldn't find all the things i missed from 'home'. Because of the dominance of the major 2 supermarkets small, local companies that produce fresh and exciting foods cannot get a foothold because they are priced out of the market and especially as supermarkets move more to own label products.
When we question our customers as to what they are looking forward to when they visit the UK, practically everyone has either M&S, Tesco or Waitrose top of their list............... and a bacon butty!
I, like you, hate shopping in supermarkets here so i tend to spend my time in a few fresh food type deli's over here in Perth. With regard to clothes both Marks & Spencer and Next now deliver to Australia. Good Luck