I'm secretly looking at my exes bank account
Is the reason you're looking at your ex bank account because of jealousy?
Why would I be jealous, they have nothing.
Secretly accessing somebody's bank account is an invasion of privacy. You should respect your ex's privacy.
It's not a matter of respecting privacy. They have nothing so I didn't really see anything.
It does not matter what you learned from your snooping. It is nosy to snoop and others will think you cannot be trusted.