Chryiss authors being able to delete reviews, so possibly they deleted negative ones.
In my humble opinion, Some humans just doesn't want to accept the truth, So they blindly create a lie to sustain their wanted desires. I prefer a frank, straightforward, and constructive review instead of a Delusional 5-star level 1 Bots. Others may not have keen eyes to notice micro details but It's good to find a flaw. Reflect upon bad reviews and erase spams. After all, We are not the perfect race, We do not have unlimited time, Nor omniscient beings and unable to work perfectly without specialized tools. Is the earth day always 24 hours? Or is it 23 hours, 56 minutes, and 4 seconds?