Collocations for unpopular - adj.

be, prove
become
remain
make sb/sth
His views made him unpopular with many.

extremely, fairly, very, etc.
deeply, highly, hugely, particularly, wildly (esp. AmE)
increasingly
generally, widely
politically
Cuts in government expenditure are politically unpopular.

among
Highly priced shares are unpopular among investors.

with
He's unpopular with the students.

Unpopular is used with these nouns:
decision