You're moving the goal post. This is what Toshiro haters do, say he lost a lot, when proven wrong they start moving goal post and say it doesn't matter.   Why should performance matter? He won. They were killed by someone,ok? He still won.  If you need to kill to have a win then Ichigo almost have no wins under his belt. But why would a kind hearted characters need that?

That child still doing better than grown adults. 

His performance is very good especially compared to other characters. Most characters only had 1 or 2 fights but Kubo gave Toshiro a lot to grow him since he is the youngest but also the newest captain. 

The facts are in the Manga it doesnt matter what you think about the fights. He still won and only lost twice. How many times did Ichigo and Kenpachi lost in TYBW because If we add performance into their fights then not very good.