I want to delete everything I have done on my AWS account except for credits and root user stuff. This includes IAM users, EC2 stuff, S3 stuff, route 53 etc. How can I do this without having to scour the AWS account to find everything? Thanks!
There are tools such as aws-nuke and cloud-nuke.
Warning: these open source tools are not provided by AWS, you should take every precaution to ensure that nothing critical gets deleted, and you are responsible for your choices and actions.
There is specific guidance on How do I terminate all my resources before closing my AWS account? which you could use, and simply not close the AWS account after terminating your resources.
You also have the option to close your AWS account.