Use the "passwords" feature to check if one of yours is compromised. If it shows up, never ever reuse those credentials. They'll be baked into thousands of botnets etc. and be forevermore part of automated break-in attempts until one randomly succeeds.
Yes and no; they have their own issues:
https://cybersecuritynews.com/hackers-weaponize-keepass-password-manager/
I assure you, the rare security issues for password managers are far preferable to managing compromises every couple weeks.
I've only really been in one breach. This one is actually a breach of a "security firm" (incompetent idiots) who aggregated login data from the dark web themselves, essentially doing the blackhats' work for them.
This is also EXACTLY why requiring online interactions to be verified with government ID is a terrible idea. Hackers will similarly be able to gain all possible wanted data in a single location. It's simply too tempting of a target not to shoot for.
Lucky you, I've been in at least 21 confirmed breaches so far.
Which I don't really care about, as I've been using unique passwords and a manager for well over two decades now. 178 of them, currently. ...half to websites that probably died a decade ago.