OKAY SOMETIMES I HAVE RESIDUAL FEELS OVER THIS.
Because so many people in the course of this show have screwed Kurt over, and not a single one of them has really sincerely apologized to him except Dave. Unasked-for, undemanded by teachers or parents or whatever, just him and Kurt in a hallway without spectators or a reward waiting, and Dave apologized in tears for what he did to Kurt. No ‘I was drunk’, no ‘but I only did it because you were blah blah blah’. Just ‘I’m sorry.’
And then, ugh, this scene here. This is Dave going above and beyond that once-in-a-series apology and saying that he knows it isn’t enough. He’s saying he understands why Kurt wouldn’t be in any hurry to be friends with him after everything. He doesn’t bring up the apology as if it should have made everything better in an instant. He understands, he doesn’t blame, and he doesn’t let Kurt blame himself.
I think Kurt was dreading this visit the whole episode because he was carrying that guilt around and thought that Dave himself would just add to it. Instead Dave tells him ‘I understand even better now how bad everything I did to you was, and you’re a stronger person than I am for being able to stand up through it all for so long.’
I just don’t understand anyone who watched this scene in the context of the entire show and was still fine with them never bringing Dave back. I don’t understand any Kurt supporter who watched this and still thinks that Kurt’s better off without Dave around.