Watched with 2 other freestylers at my place and we were all of the opinion that you should've won.
You destroyed him as far as lowers are concerned, but I think you should've showed a bit more all-round skill, but I think the biggest mistake you made was going back in the 3rd round after you decided that's the end of your round, because you made several mistakes after that and that just made your round look bad and threw the focus of the good stuff you did. ;)