General negativity:
* Critical: Focuses on finding fault.
* Condemning: Expressing strong disapproval.
* Censorious: Expressing severe criticism, especially moral disapproval.
* Scornful: Expressing contempt or disdain.
* Disparaging: Speaking negatively or belittlingly.
* Contemptuous: Showing or expressing contempt or disdain.
* Derogatory: Expressing a low opinion.
* Sneering: Expressing scorn or mockery with a facial expression.
* Supercilious: Behaving or looking as though one thinks one is superior to others.
Focusing on assumptions:
* Prejudiced: Having a preconceived opinion, usually negative.
* Biased: Having a tendency to favor one side over another.
* Preemptive: Acting before others have a chance to express their opinions.
* Assumptive: Making assumptions without sufficient evidence.
Focusing on severity:
* Unforgiving: Reluctant to forgive mistakes.
* Intolerant: Unwilling to accept differences of opinion or behavior.
* Harsh: Unkind and severe.
* Rigorous: Excessively strict or severe.
More neutral:
* Evaluative: Involving assessment or judgment.
* Opinionated: Having strong opinions and expressing them readily.
* Analytical: Breaking down situations into their parts and examining them.
* Observant: Paying close attention to detail.
The best word to use depends on the specific context and the nuance you want to convey.