Okay, I was just rewatching the two parallel conversations between M and Near and Chris and Jeno in the last episode of Second Chance because I think about these things.
And it's really so well done for these tiny dramatic gaybies.
M is offering to not see Near again... but his apology is more about who Near is and why he didn't tell him and it's about Near, not about M at all. M isn't apologizing for his choices. He's mostly just sticking the word sorry into an explanation.
Chris genuinely apologizes. He genuinely apologizes for his actions and offers to leave. He admits what he did wrong, explains how he could improve and never, ever puts the blame on Jeno. He makes it clear that this was his mistake and he doesn't expect forgiveness.
M expects forgiveness. He expects everything to go back to normal, or better. He doesn't think Near has any real reason to be upset and he doesn't understand why Near isn't listening to him.
Just look at their reactions when they either are abandoned or think they're going to be...
M is in disbelief, he's disappointed, he didn't expect this outcome at all.
Chris is pained but ready to accept his fate, knowing that he's making the right choice by offering Jeno this chance.
And that's why Near left.