Imagine being a former mentor, who pursued youth, strength and a hagakure-ish outlook in order to avoid what happened to your students in the past, only to be a literal fodder, even classified as a B rank demon, as in “bitch”, what a utter waste of a character, all these years he trained just to become a jobber, to a underage manlet no less, at least Ulquiorra lost to hollow possessed Ichigo. All this, just because Togashi couldn’t keep his powercreeping boner in his pants, no wonder Togashi didn’t even bother to give us his full name in the manga, and just copied Frieza, the cool shit at the time.
Mismatch, Yammy alone in base is monumentally stronger than them.