People like Olorunfemi thrive by taking ideas of others to shine, he could had acknowledged you for being the brain behind the debate idea.
I get why you will have a grudge against him, but since it's been such a long time ago, I think it's best if you let go of such grudge.
I guess, after writing this I feel a little better. Thank you for the advice, @funshee
Writing about our feelings sure has a way of making us feel better, have a lovely day❣️ @iskawrites