Remember when Scott was about to test the time machine? They have 2 vials to use. He accidentally shrunk himself and he said they only have 1 left for the test. The 2 vials are full before they used it. He used a full vial of pym particles just to shrink down.
Did they explain why in endgame a pym particles vial is only used once per person? While in other ant-man movies a vial of pym particles can be used multiple times.
Remember Netflix's password sharing ban outrage? It didn't work, they gained more subscribers. People stay because they don't know how to sail the high seas or are too lazy to do it.
Navy seals then.