If you didn't use 2FA then what advice were you giving to others on how to keep their Bitcoin safe?
I never give these kind of advices why would i need to say: use 2FA with your online wallet in the middle of saying print your priv key and hide where you think it's safe (hodl it codl). Thats beeing said it was my hot wallet where i stored more then i should, i didn't used 2FA cause i need to access my wallet many times a day and scanning the QR(or reading emails/sms's) code every few minutes is is stupid keeping mind that i should do it many times.
You should always take advantage of two factor. I don't think the few seconds it takes to type or copy and paste a short code is much of a hassle and those few seconds would've probably saved your funds. The only time I ever see people's bc accounts getting hacked are when they don't have 2 factor set up.