Earlier this month, Bryant responded to being ranked No. 40 by ESPN by saying "I've known for a long time that they're a bunch of idiots."
During Tuesday night's game between the Lakers and Houston Rockets, Miller called out Bryant for his approach to the rankings.
"Kobe needs to stop being so sensitive, too. I mean, because you're ranked 40th, dude you are 36-year-old and 19th NBA season. Father time is still undefeated. Why would he be any different. He needs to stop being so sensitive to what other people say about him."
Bryant scored 19 points on 6-for-17 shooting in Tuesday's season opening loss to the Rockets. It marked his first game since December 2013 as he returns from a fractured knee.