SO! In short:
Use Yubikey, or 2FA or any of the numerous systems I mistakenly thought were optional.
NEVER use any kind of online banking, Bitcoin or otherwise, if you notice suspicious or new processes running in the background(I saw Stronghold Online Backup running and thought nothing of it and paid the price)
Never put any money into Bitcoin you’re not afraid to lose. I always knew there was a slight chance that $500 could be gone at any moment which makes this loss slightly easier. Still fucked up and annoying, but I will survive to buy another BTC.
Thank you for reading and I hope this never happens to any one of you!
I should probably look into the two factor authentication... However, it's also on my to-do list to follow the instructions for creating a secure paper wallet and putting that in a safety deposit box at my bank