I'm mad at someone for forgetting to grab something before we left
Did you make it clear about what to grab?
I've always given them subtle hints in the past which they ignored.
I can understand your position. It's understandable to be upset with someone who didn't do what you asked them to do. I think next time you should try to be more clear about what you are wanting.
It's their fault for not just getting it. But I get what you mean. Hints are not always taken so well. I know I would have been somewhat confused myself at times.
Exactly! Try to be direct when you want something, that would be an epic way to go about things you want. Never make people guess about things.