Me being me, I don't deal with this stuff and I'll let someone know what is on my mind whether they like it or not. I would leave, I have no tolerance for things like that.
Having said that, answering this with an open mind, I would keep an eye out on things to see if they improve. This could be an absolutely incredible learning opportunity if things improve. If the program just started, it could be that they don't have things settled with feedings and watering? Tho it's not a good excuse to leave horses without water.
Give it a little longer and see if things fall into place.