Bruce Jenner’s oldest son, Burt Jenner, is commenting on Jamie Foxx’s jokes about his dad during the opening monologue of the iHeartRadio Music Awards on Sunday.

Burt says has no problem with the jokes, he just thinks Foxx is trying too hard. Burt told TMZ at LAX on Monday that Foxx’s career is on the decline so he’s resorted to copying comedian Kevin Hart.

Burt told the cameraman, “I think he is just copying Kevin Hart because Kevin Hart is taking all of his movie opportunities.”

He continued to say Hart is “on a roll” professionally and Foxx is “on the way down.”

Burt continued to say he wasn’t happy at all that Hart made jokes about his dad in front of his half-sister, Kendall Jenner, while at the Comedy Central roast of Justin Bieber.

As we previously reported, Foxx made fun of Bruce’s reported transition to become a woman, saying he was going to perform a “his-and-her duet all by himself.”

image via Peter West/ACE/INFphoto.com