So i don't know much about powerlines, at all, but i was recommended by a friend who knows his computer stuff. I have a 200 MBbps internet speed, and i had a a cable running through the house to bring me internet, so i decided to upgrade to a powerline, so could get rid of the cable, but the thing is, i only get around 40-50 MBbps, be it by wifi through a TP-Link router i have or through LAN. So, i have no idea what went wrong, anyone got any ideas? Any questions?

The model has a passthrough and is the AV1000 with a gigabit ethernet port.