I'm following Kraco on this.
He had a very good female friend he was in love with and was waiting an answer from her to start and share her life in Tokyo.
Although very differently, he was basically chasing a love target like Kouko is.
He clearly doesn't know what to do anymore, he's angry after himself for being in love with Kouko and chasing her when he was so in love with Linda and chasing her too... and the fact he was able to forget so completely something/someone so important.
Since he couldn't do much about that anger, he turned it towards Linda and Kouko, using the fact he doesn't want to wait anymore. After all he was in a similar position both time: waiting for his love target to share his feelings, but that was draging on both times.

Now we need a better explanation for the accident. Linda was very late the day she had to give an answer to Banri on that bridge. She sped up quite a bit I guess. But I wonder how/why she ran over him. That part feels strange, because I see no good explanation to how it can happen.