The available bandwidth is smaller than the stated speed because you are not the only student in that college who uses WiFi. If twenty people are using it at the same time, you will get one-twentieth of the max speed.
You are banned for wanting to get an unfair advantage over everyone else by illicit methods. May I suggest that you plug your Ethernet port into an Ethernet socket at times when you need blazing speed, or purchase LTE connectivity from a network provider.