There could be several reasons that your competitor's reviews are better than yours. For example, the number of your reviews for your company might be very less. Less number of reviews may not present a clear picture of the company.
In order to up your game, encourage your current and former employees to leave reviews for your company. This can help you get better ratings. However, please keep in mind that compensating or coercing employees into leaving a biased review is against our community guidelines. The reviews will be immediately removed in such a case.
Additionally, you are advised to take the negative reviews and ratings constructively and analyze the parameters that you are lacking on. For instance, if your company generally receives lower ratings on work-life balance section, maybe it is time to take care of this aspect.
Over time we believe as you start getting more reviews, the overall rating would give a better picture of your organization.