The biggest slow down of your downloads is probably other people downloading at the same time. For things like ARK: Survival Evolved there may be 100+ people downloading from the same location which could slow your download. The server might also slow your download so it’s not overloading the server as well
How long does it take to download ARK: Survival Evolved?
How Long Does It Take To Install ARK: Survival Evolved? About 30 minutes tops are usually required. It can sometimes get hung up trying to install.