TL was upset that I ended a walk early

I was in a 150 item walk. It was almost time for me to leave at 6. I got 30 items into the walk and then I ended it. The TL got a little upset and said that it hurt there first time pick rate something something, and next time I should go find a TL so they can finish the walk. I'm guessing they meant hand over the device so they can finish it, except I have a work phone and I would like to take it with me when I leave, of course unless there is a way to transfer the rest of the walk to another person mid walk, idk. When you end a pick walk, do all the items not go back into the system for other people to pickup? That was my understanding of how it worked.