You can easily have low scores and negative comments deleted by making a Report/Conflict of Interest with the location authorized account.
If you report the opinion in the first hours of its arrival, it will be deleted.
Follow-up is important, comments that are over 1 day old (authorized email) may not be deleted.
or you can try your luck by sending spam from 6 accounts at once with the Conflict of Interest option.
I have removed low scores and bad comments this way, but it may not always work. But I recommend you try it.