James Harden hit out at the Philadelphia 76ers in his introductory media briefing as a Los Angeles Clippers player, resulting in Joel Embiid biting back.
Harden completed a move to the Clippers earlier this week, having fallen out of favour with the leadership in Philadelphia.
The 10-time All-Star broke the assists record last season as Philadelphia went on to reach the Eastern Conference semifinals, which they lost to the Boston Celtics.
Harden joined the 76ers after an unhappy stint with the Brooklyn Nets, but in August he criticised Philadelphia's president of basketball operations Daryl Morey, who he branded "a liar".
In his first appearance in front of the media since his move to Los Angeles, Harden was asked where it went wrong.
"Changing my role, which media [felt] is ball dominant, which my ball dominance is really effective," he said. "Changing my role, trying to change the narrative, trying to sacrifice and do whatever it takes to win at the highest level. That's not talked about. It's the other BS.
"So me leaving Brooklyn and thinking I'm going to retire as a Sixer, and the front office had other plans. They didn't want me. There's a lot of narratives and people think they have an opinion. But none of that is true.
"[They kept me] on a leash. I think the game and I'm a creator on the court. So if I got a voice to where I can, 'Hey, Coach, I see this. What d'you think about this?' Somebody who trusts me, that believes in me, that understands me. I'm not a system player. I am a system. You know what I mean?"
Harden's former teammate Embiid, who was the league's MVP last season, disagreed, though.
"I think he did a lot of great things for us," Embiid said of Harden.
"But in my opinion, we gave him the ball every single possession, because he's really good. He's an amazing player. Obviously, being that great of a passer, I think we gave him the ball.
"We'd give him the ball every single possession to just go out and, you know, do his thing. And from there he had to make decisions as far as getting guys open or looking out for himself.
"But I thought he did a pretty good job of getting us into an offense and just passing the ball, getting guys open. That's the reason why he won the assist title last year."
Embiid wishes Harden well, though.
"I'm happy that the situation got resolved, and I'm happy for him," he added.
"I hope he has a chance to succeed, make a lot of money, play good basketball and be able to win. And I hope we both make the Finals, but he's on the losing side of it and we are on the winning side of it.
"But I think when you're looking at the situation, from where it probably came from, we couldn't do anything. It was out of our control. So in that situation, you've just got to go with it.
"But I still believe we had a chance [to win together]. We were right there, especially with the team that we have right now. What he is able to add and what he has done, what we've allowed him to do, we gave the ball every single possession.
"It's unfortunate, but we've got to just move on and we've got a good group of guys that can grow and keep getting better."
Harden is set to make his Clippers bow against the New York Knicks next week.