A Gmail account getting suspended or banned for no reason feels like a punch to the gut, but in reality their AI flags tiny things like logging in from a new IP or sending too many emails too fast, and once it decides you are suspicious, the ban hits instantly. The best way to protect yourself going forward is learning exactly how to avoid it, and a complete breakdown of the triggers and safe practices is laid out here
https://gologin.com/blog/gmail-account-suspended/ . Worth a read before you set up a new one and get hammered again.