Dude, how is bitwarden hosting your own, locally encrypted (in FOSS client) password database any different than using keypass and syncing it however you want?
I don't even use Bitwarden myself, I'm using keepass too, but this attitude is ... weird?
Bitwarden client is FOSS same as Keepass, though. Why aren't you afraid of Keepass having backdoor by "insert whatever big corporation sponsoring FOSS" giving said companies free access to your passwords you happily store in their clouds?