unfair

"The harsh criticism from the teacher unfairly unmade his final project, leaving it looking quite unattractive. "

"The dress was quite unfair; the fabric was rough and the color was dull. "

"The student felt unfair at the unexpected cancellation of the field trip. "

"His outburst at the meeting was unfair; it was disgraceful and inappropriate. "

"It was unfair for the boss to give larger bonuses to his friends."