You don't know Tavis Ormandy?
https://en.m.wikipedia.org/wiki/Tavis_Ormandy
tl;dr
"If you want to use an online password manager, I would recommend using the one already built into your browser. They provide the same functionality, and can sidestep these fundamental problems with extensions."
I can only speak for myself but his article confirmed my suspicion about any Password Manager, even Bitwarden and I never have or will use any online Password Managers. I create all my Passwords individually with my own algorithm in my head and can always recreate them.
Ya the conclusion is very clear
Also there are studies showing how bad mental formula passwords are, while computers are not truly random, humans are even worse.
https://lifehacker.com/password-formulas-don-t-fool-hackers-1826238163