You can uninstall the Epic Games Launcher from your PC or Mac using the Control Panel or Applications folder, respectively.
You can uninstall Steam on your PC easily, but it'll also delete all of your games. Here's how to backup that data and uninstall Steam.
Creating a new account is one thing, but deleting it is a whole other difficult process. Sometimes it's not as simple as pressing the delete button, and it's not obvious where you can find the option ...