This doesn't look like bots or trolls, it's legit users that really voted what they think, which is fine by the way. Not everybody has to agree, otherwise what would be the point of asking in the first place.
One thing to keep in mind is that people are rating the pic, not the person, you can look great and have bad pictures and vice versa.
Just to circle back on your ex's post, there was only 1 person that voted using 3 accounts and we'll clean it up now, but other than that, the rest seems legit. Still don't understand why people do that.