It was a bit disappointing. But I understand where RK is coming from. He just needs an outlet for his anger and hurt. And some time to forgive Madhu. It will happen slowly. We just have to wait. Even Madhu did not forgive him instantly. So, we should not expect RK to forgive her immediately. That is not in his character. For now, all he can see is, his dreams are broken, on the day of his wedding. The wedding and celebrations seem almost meaningless, now that hurt and anger has taken over.
Just give the couple some time. They will sort things out. There is too much of love between them for these things to prevail for a long time.
And I am sure Madhu will win him over again.