Earlier quoted context omitted.
Except it's not bad usage. Even Merriam-Webster approves, it's the second definition listed, and an additional usage note validating it: https://www.merriam-webster.com/dictionary/comprise
"Bad usage" or not depends on one's style guide. The better ones are better.
It may not be your personal preferred usage, but it certainly isn't bad usage if a major American dictionary approves.