There are two types of people:
1) Nice people
2) Assholes

Therefore there are many trans people out there who are just simply assholes. They do things like
1) Make outrageous claims to get attention (eg claiming certain other trans people aren’t trans)
2) Condemn and cancel people who disagree with them or make honest mistakes instead of engaging in healthy debate

Of course being an asshole is usually a symptom of abuse and insecurity.