cut, tear, etc. something to ribbons
tear (someone or something) to ribbons
1. Literally, to destroy something by ripping or tearing it. I got so frustrated with that sketch that I finally just tore it to ribbons.
2. To judge or criticize someone or something harshly. I thought I had done a good job on the project, but my boss just tore me to ribbons, pointing out every little thing I had overlooked.