You're not simple, you're just optimistic and think well of people. It's not your fault that some of them don't live up to basic expectations of professionalism and fair conduct.
This is why I personally don't place all that much stock in reviews or anonymized star rankings from random people on the internet* (or in print outlets, for that matter) and myself prefer to filter unknowns by different criteria, which admittedly can also be misleading in different ways, but are at least generally harder to fake, current authorial ability to enter any publisher name in the KDP upload notwithstanding.
* Except for the
hilariously funny fake ones, which constitute an art form in and of themselves and often display greater creativity and writing skill than many of the "we normally charge 99 cents or more for our deathless prose" slushpile offerings, IMHO.