It was clear Maia is better grappler. Kim couldn't get out of that position. Maia was cranking that ribs really tight. It looked Maia was hurting Kim while standing. Maia's grappling and skill caused Kim to injure. Kim didn't injure himself. Same with Shogun vs Coleman 1. Coleman was just so damn powerful for Shogun. That's why Shogun couldn't land properly. Big force will injure you.