I'll keep it quick but detailed.
Corrupted W10 bootloader wasn't being repaired by any of the bootrec commands. Was planning to preparing to backup an external drive and accidentally wiped the main partition with diskpart clean, and then created some quick formats also using diskpart. It was now a RAW disk. The entire 500GB SSD.
I quickly booted in to Linux Mint and foolishly tried to recreate the GPT table using GParted. I think this was my second mistake.
I then realised what I had done, and used ddrescue to create a copy and send it to an 800GB partition on a separate HDD.
Now I am at a stage where if I use TestDisk I get the following:


Are my chances greater then 1% here? Because I don't think it's very likely to recover anything other than some stray files here and there.
Often I will get the error that filesystem damaged, and FAT errors, etc.