That was clear from the first episode itself, when they showed things like Surya being furious @ Karna being abandoned, Radha giving birth to a son that very day and hating Karna after finding out that she didn't give birth to him.
I was puzzled by the determination of this PH to glorify Kunti: for a Karna centric show, she should have been the villain. But today, they hit a new limit when they depicted Karna as being needlessly rude. In this imaginary story, they depicted Karna as helping the Pandavas kill this imaginary demon sent by Shakuni & Dury, and what followed b/w them was unbelievable, given the characters of both the Pandavas as well as Karna.
Yudisthir thanked Karna for helping them, and Karna told him that he doesn't help Kshatriyas, just saves them. Bhima took issue w/ that, and Yudisthir overruled him and accepted Karna's point. Karna then told him that he's either a great soul or a great schemer, and that pissed off Arjun, who warned Karna that nobody insults their Jesht.
The fictional story aside, the above encounter reflected poorly on everyone but Yudisthir. Karna so far had been happy to be gracious to everybody who extended to him a hand of friendship, and didn't hate anybody. Suddenly, he hates the Pandavas for no reason other than them being Kshatriyas. It's true that this serial wants to depict Karna's story as a caste struggle, but since when did Karna have a chip on his shoulder about Kshatriyas? This is an invention of ⭐️B when Karna sought to ingratiate himself to Parashurama: none of Parashurama's disciples - Bheeshma, Drona or Karna had any beef w/ Kshatriyas.
What was worse was Karna's behavior: up to yesterday, he had been gracious to everyone he ever encountered, but today, he needlessly brought up a fight where none existed. That doesn't reflect even the real Pandava-hating Karna. Also, he taunted the Pandavas wondering whether they could have killed Agniparv w/o his help, and Arjun regretted that they didn't get the opportunity to find out. And later, when Arjun goes to fetch Karna, who's headed for the forest, the latter ignores his calls, and Arjun sends forth arrows to block him. 😕
I do wish they had preserved the character profiles of everybody at least on Karna's side, even while making things up out of whole cloth