"Yeah, I talked to him about it. He started out kinda defensive, but then he got like... 'I shouldn't hold grudges, it's so Goro Akechi of me, I'm such a piece of shit for that.' But he sounded like he'd apologize to her."

Which Ren cares about way more than he cares about any apologies made to him. But the downside of that is, it leaves him as the only one saying he's sorry.