1. Yamato was in her hybrid form vs Kaido but base vs GB
2. She did a named attack on Kaido and not GB
3. She only made Kaido bleed a tiny bit only to wince in pain and fall to her knees while coughing up blood a chapter later taking more damage than what she dealt to Kaido
The damage was just a little delayed so no, you’re wrong. She did in fact lose the clash