I think it depends on the product. In general, review scores that are “too low” in the opinion of people are more often the target of criticism.

For example, Nintendo fans in general will give massive backlash to reviews that are not 10/10 for Nintendo games, even if the lower score is legitimate.

On the other hand, IGN often is made fun of for scoring bad games too high. This is because publishers won’t give review copies to reviewers who dont score their games highly.