The Web Platform installer provides a mechanism for discovering the installation products and then chaining the installation packages, Sorry there is no uninstallation feature .
As you found Add /Remove programs if the only way to remove the installed programs.
If you need to get a list of what you installed you can find the installation logs here where the date time is the time from your installation.
%localappdata%Local\Microsoft\Web Platform Installer\logs\install\<Date Time Stamp Folder>