Chad's budding career as a professional fighter is only hinted at, and no one could see Uryu mend ties with his father Ryuken and begin his own career in medicine.
No one ever saw Ichigo and Orihime declare their love for one another, and Rukia was only briefly shown becoming squad 13's official Captain, with nothing known of her leadership skills. Now they finally have peace, and readers get to know very little of what their peacetime lives are like.
Some fans might have objected to the Ichigo/Orihime pairing given the strong chemistry between Ichigo and Rukia, but the real issue is that readers spent over 600 chapters getting to know these characters, and their lives were defined mostly by combat and adventures. Uryu and Chad made brief cameos, as did Rukia and Renji, but little else is known of their fates. Grimmjow's and Nelliel's fates were left unknown, for example, and the final chapter jumped forward a handful of years to show Ichigo and Orihime married as a happy family, including their young son Kazui. However, the manga only had two more chapters after that, and many loose threads were either tied up briefly or not at all. Thus, the lengthy Thousand-Year Blood War arc came to an abrupt end when Ichigo and Uryu Ishida defeated Yhwach once and for all, leaving countless loose ends in the process. Kubo's health was declining due to stress and illness, and he was having trouble continuing his tale.
