Feeling dehumanized isn't just "feeling slighted."

 The word "slighted" is for trivial, temporary, ultimately unimportant things that are only important if they add up enough or are excessive enough or chronic enough to harm the person... the phrase "feeling slighted" is not for things like dehumanization.

When a person feels trivialized and reduced and oversimplified and dismissed and dehumanized as a person, that shit is REAL. If it wasn't the person they say did it who did it, we need to find out who really did do it (because in this case it's a "straw that broke the camel's back" situation). Not as a witch hunt-- as a way to solve the problem to make the victim feel and be humanized again as they always deserved to be in the first place.

"Slighted" is a word to use when your aunt prefers your sister over you, or when you keep getting the smaller slice of pizza than others are given, or when your birthday present and Christmas present are combined into one due to your birthday being close to Christmas while everyone else gets two presents.

"Slighted" is a sometimes-dehumanizingly trivial word to use for non-trivial matters like dehumanization. Dehumanization can include dehumanzing things being spread around about you too, especially if it's harassment or if it's spread to large groups of people or to people who have access to you who can make your life miserable, or to people with power or who are in authority.