There are a few companies that do adhesive patches for the cgm's, due to the lack of suitable adhesive by the product itself, as you have discovered.
We use Rockadex
https://rockadex.com.au/
I think you can also get like a sleeve to wear over top too but these don't appeal to everyone.
My eldest loves her libre sensor (new version). Connects to her phone so very easy to scan whenever you like and provides good data throughout the day.
My youngest uses dexcom g6 as she has the new tandem t slim pump and that pairs with the g6 to be almost a closed loop system.
Real shame that you don't qualify for any subsidy. It doesn't sound right to me but I'm sure you've checked it out. Have you tried JDRF? They offer some support also if you can't get govt support.
Good to hear you've found a good Dr. Makes a big difference.