I'm sorry to hear that. It turned out for the better though, I hope.
Those are a lot of questions. I will do my best to answer them.
My name is Thor Odinson, Crown Prince of Asgard god of thunder. I know of this event you speak of, with Thanos, but I am not the Thor from your universe. I come from another. There are many, many universes out there, each doing their own thing but maybe a little different, sometimes a lot different. This campus is caught in a space that travels amidst and in between universe, relocating once every seven days. Our destination, such as this one, is seemingly at random.
At every reset, basic supplies are always provided in the kitchen, so we will not starve. However, many of us have taken to gathering more and better quality of provisions when possible. The items that we bring with us usually stay with us after the reset, however once they are broken, or in the case of food and drink, are used up, they are gone and will not reset.