Kiyotaka's statement in Y2V6
Those are Ayanokoji's words from Y2V6 after a talk with Horikita. That's after the sport festival. He's saying he will leave Horikita's class - that's now clear for everybody especially after the last volumes. However his monologue here gives us a glance at his motives.
"However, I planned on leaving precisely because I want to be defeated. I wanted there to be uncertainties in the future". He wants to be defeated and that's why he's training Horikita.
He sees the potential in her being able to beat him. "I would teach her that, for her own sake, and no one else's". She will realise that she's able to be much greater and Koji is only there to help her become this version of herself.
"She'd definitely understand" he's sure of it and this only proves that he believes in her winning over him. Her being better goes along with her realization of her potential.
And finally "The time would come when she'd have a class that she was absolutely convinced will win, and she'd be faced with the reality that she couldn't." What would Horikita do when she will be at her peak yet not being able to do anything; to win and at the end lose? Well we don't know but Koji has the hope that she will somehow handle that situation and change it into her advantage. "I wanted there to be uncertainties in the future". He knows that in the end he will win, his victory is predictable for him ("in the end winning is all that matters") but he wants to be defeated; to get rid of the confidence of winning; to his victory become something not 100% predictable so that there would be some 'uncertainties'.
"There was a contradiction there: I had an answer, but I wanted to be wrong". He always had the answer, the one and the only possible answer: him winning - but his desire is to the answer be wrong; to him lose one day.
So has something changed in his goals so far before the start of Y3? Welcome to the discussion. I also want to point out that english isn't my first language so I'm sorry for possible inconveniences🙂↕️.