Can't you identify the useless ones in their first 90 days and get rid of them easily?
My store was/is desperate for bodies they couldn't term them cause even half speed was better than nothing, now we are stuck with a bunch of these kids who seem to think that showing up deserves a trophy, when they fucking show up. Then have four of your TL's quit within two weeks of each other and you are almost no floor coverage or anyone to write up these zombies and the cycle starts over.
That is actually what killed us, the shuffling of the TL's cause one would start a file on someone then get shuffled and the next TL would start over with them, quit, new TL and start over again. That and our ETL leadership is lazy AF and doesn't want to do the paperwork.