Im so happy someone actually respects Rengoku and doesn’t call him a donut. The fact that he fought Akaza until daylight is already incredible. He also managed to let no passenger die in the train. He was a great character.
As far as what Rengoku Kyojuro did, he fulfilled the promise of “the needs of the many outweigh the needs of the few”. He nobly fought to the bitter end near sunrise. Although, some might make jokes about it. I agree with the creator, it is disrespectful to his sacrifice. He was, quite literally, a hero for those who were in danger at that point in time. He prevented the deaths of many.