There’s nothing wrong with going back to the drawing board.
Nothing wrong in admitting to yourself that maybe you got it wrong; that the results you were expecting didn’t quite pan out; or that maybe you didn’t take enough time to figure out what you really wanted, what direction your life, your project, your business should take.
The fact that you’ve spent a substantial amount of your time and money working on something that either didn’t work out, or is no longer something you want to do, should be punishment enough. Mentally beating yourself over and over again accomplishes nothing and ends up being counterproductive, because it prevents you from learning the lesson(s) you need to learn and move forward.
You must look at the positives in every situation, the lessons that can be learned. At least you now know what isn’t working or rather that something isn’t working; this means that you can now focus on turning things around.
Being afraid of being called indecisive or even a failure isn’t enough reason to continue on a path that you’re not 100% committed to.
Starting over can be a blessing, you know what to look out for, what works and what doesn’t. You know better.