BOSTON, MA - APRIL 22: Brad Stevens of the Boston Celtics looks on during the fourth quarter of Game Three of the Eastern Conference Quarterfinals during the 2016 NBA Playoffs against the Atlanta Hawks at TD Garden on April 22, 2016 in Boston, Massachusetts. The Celtics defeat the Hawks 111-103. NOTE TO USER User expressly acknowledges and agrees that, by downloading and or using this photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Maddie Meyer/Getty Images)

Celtics player was irked at home fans cheering the opposition and it only got worse from there

It really is bad form to criticize your own fan base

The Boston Celtics defeated the Utah Jazz 115-104, but Celtics forward Jae Crowder was still displeased after the game.

Related: Two Celtics get so sick they had to be hospitalized

Crowder said he wasn't pleased with fans cheering for Jazz forward Gordon Hayward before the game.

Hayward played for Celtics coach Brad Stevens in college at Butler, but it's still peculiar the Celtics fans — normally a hostile crowd — were openly cheering for Hayward. Hayward scored 23 points in the loss, while Crowder scored 21.

(h/t CBS Sports)