I completely believe you. I got in a similar situation in 2020. In that case it was a change of password of the main account that went wrong. How? Don't know,

I completely believe you. I got in a similar situation in 2020. In that case it was a change of password of the main account that went wrong. How? Don't know, I have a password manager that captured the password I inputted and it was exactly as it should inputted. But when I put it in google it told me that it was incorrect. When I commented to people, everyone told me that they could change their password doing this and that, but... I wasn't. Looks like there are different security levels based on arbitrary rules and what an user could do, I was unable to do it. I only had the account logged in in my phone, and every day I kept restoring the account, every day to be unsuccesfully. One day, after 5 weeks from the day it happened, doing exactly the same than the previous days, one of the recovery attemps worked out, and was able to reset my password. It completely put me off using google services, but God, it is hard to abandon your first mail services, I got way too many things hooked up with them.