When people are critical without stating a reason/not having a reason.

This was inspired from when i posted some vintage jackets on a Facebook sale group, and the comments were "yikes" and one "trash ass jackets". Those comments had 20+ likes each and the other commenters seemed to agree with them, when I replied i was met with laughing replies and more negative comments. It's not like they were overpriced, they're all in line with prices online and one even sold from that post. I really don't get why people do this. It's not only there, it happens all over. I did nothing wrong, and was still met with criticism.