Sorry to hear of this hack and loss of funds. So what this a man-in-the-middle attack or a compromised file on USB stick?

Just trying to figure out what led to this illegal access to your computer, or rather how it occurred.

Your recommendations are good... I also recommend not using public wifi ever unless just for browsing and not on an important computer and of course never sending passwords over that wifi network either.

I have also heard of people using their personal wifi but then going hardwire when logging in to accounts just in case.

Also, finally why it is good to use physical wallets such as Ledger Nano only because it requires physical access to the device, even if your computer is compromised.
Hope things work out or get better.