You must be an executive lead if you are working 15 hour per day. Sorry to heart that.
I have been training some of our seasonal TMs and my experience has been the same. Each seasonal seems to be worth about 25% of a normal TM at best. When I look at MPM and greenfield numbers, that's their productivity and output, never mind the errors that metrics do not show (wrong shipping labels on packages, bagged OPUs incorrectly, disorganized SFS carts, put cooler & freezer items into dry storage, fake picks, destroying the backroom). I've tried helping them correct their mistakes but they continue to repeat them. They're getting paid same for doing a lot less.
Bigger problem is their attitude. Late, constantly calling out especially claiming that they think they have Covid, long breaks, refusing to respond to radio, ghosting away, leaving early without telling anyone. Even worse, I don't see any improvements over time. Target's hiring process needs to be better and stop hiring these adult-children.
This will be last holiday season with Target now that I have couple job offers once I finish my degree next year.