Delay Connecting To Internet - Wired Connection

I used their terminology. The gateway is what my fibre line is connected to from the wall. They also supplied a wireless router they refer to as a Booster and that's what my PC is plugged into. The supplied ethernet cables are a joke and are maybe 3 feet long. They don't reach my PC. I had an old cable lying around but it didn't reach either so that's why I'm plugged into the wireless router and not the gateway directly. It literally says in the title and in my question that it's hardwired.