Thank you for your post & welcome to the community.
I'm sorry to hear you're having issues with this. We do advise to use a password between 6-10 character long, including at least 1 number, 1 capital letter, 1 lower case letter and ensuring that it isn't your surname or first name.
I feel like someone needs to look at the password validation. I use a password manager to generate a 10 character password meeting those criteria, and it was refused. The password rejected was 9VJcMdzWr9. I can’t imagine why that was refused.
Out of interest I tried Passw0rd and that was marked Good.
I obviously didn’t try and follow through on Passw0rd, so some later check may have caught it, but really???