If I enter an invalid image as a parameter or something, the build logs will just say the resource is stuck on Creating until it eventually times out. If I inspect the pod manually, I will find the error.

You can use the TF_LOG=debug to get more info, but for some reason that makes builds take a very long time: #4766.

Additionally, there is a lot of noise with this log level. Perhaps it's only helpful to the user when an error occurs or when someone is modifying the template. Something @kylecarbs suggested was a "Run with debug logging" option when building workspaces, but that could make it difficult to debug race conditions.