What’s more likely, a password manager gets a breach or someone targets only me and manages to find out multiple passwords across multiple services and cross compares them works out what the random numbers and letters mean…

I use a “password pattern”, rather than remembering all the passwords, I just remember a rule I have for how passwords are done, there are some numbers and letters that change depending on what the service is so every password is unique and I can easily remember all of them as long as I remember the rules I put in place