Answer:
It imposed tyrannical behavior and acts.
One of the freedoms and rights of man that the Revolution tried to impose is:
"Justice with a trial", where anyone (no matter rich or poor), could receive a public trial and have the chance or opportunity to defend themselves and acts, or justify the reasoning behind what they've done or whether they've done it.
It also implemented fear in their hearts. Without trials, arrests and persecution were extremely simple and easily managed, meaning anyone could now quickly, and without any way to justify themselves, get incarcerated or even executed for their crimes (whether they've done them or not).
So...
- They were mad at the tyrannical, autocratic behavior he was showing off during times of change and revolution.
- He would already frustrate them with other human rights and civil rights violations, there was no freedom of religion, property, or speech in France.
- They believed he had violated their trust, rights, and safety.
- They despised the idea of the nobility and clergymen being able to hold trials whilst citizens could not.