It is different on your compromise. If the compromise happened directly on Twitter. Hacker changed your Twitter account's password on Twitter, Google has nothing to do and you can not say it is their failure to warn you. Twitter failed to warn you on the compromise instead.
I just added google because it is not good to save password online, but google can not be blamed in this because they are even the one that helped me by notifying me, I did not have them any blame.
It is good but did you use 2FA for your Twitter account?
No but I will turn it now from now, thank you for the good suggestion.