Collocations for unfair - adj.

be, seem
consider sth, regard sth as, think sth
She thought it most unfair that girls were not allowed to take part.

extremely, fairly, very, etc.
blatantly, grossly, patently, terribly
I thought the decision was grossly unfair.

totally, utterly, wholly (esp. BrE)
a little, slightly, etc.

to
He was terribly unfair to the younger children.

Unfair is used with these nouns:
advantage, burden, comment, comparison, competition, criticism, disadvantage, dismissal, distribution, practice, prejudice, treatment, trial