Yea, Yu Yang was a disgrace. It was a big mistake to let her go to Rio. TYT could have won a medal possibly gold without Yu Yang. But Yu Yang did not have an effect on XD or MD. On the other hand, LYB knew in 2015 that something had gone wrong with ZYL, TQ and Zhang Nan. But they bite the bullet and soldier on. LYB should have cut his losses in 2015. Had LYB told ZYL to step aside, there were still some possibilities that new pairs in WD and XD could have been formed just in time. Instead of cutting his losses, LYB doubled down on ZYL. The rest was history. Thank goodness FHF/ZN still won.