Google simply doesn't allow business owners to remove reviews about their business, and for good reason.
Why can't I delete my own Google review?
And Google doesn't offer a direct option to delete reviews.
The closest option is to flag reviews from within your account to alert Google support of an issue, but you cannot delete them yourself. Also, reviews are automatically processed by Google to detect inappropriate content, such as fake and spam reviews.
How do I remove a Google review I left on my phone?
On all devices, scroll down to locate the review you're looking to delete. Once you find it, click or tap the three dots to the right of your review, titled "More." Click or tap “Delete review,” the second option. This goes for users on any device.