Thats a quite important topic, thank you for telling us more about this. Your example was quite good, so it got more easier to understand the Problem. I although got the experience that KeePass is quite useful, you can even use it to generate passwords.
If you installed KeePass, don't forget to save the data of KeePass on a Stick or so, so the passwords are safe and protected before accidents like pc crash etc.
RE: Do YOU have 2FA enabled? Do you use a password manager? The convenience of cutting these corners is NOT worth the risk!