I have this problem.
I have a TP-LINK Archer C7 for my internet and WIFI connection, wich was connected to a cheap pstn modem-router, provided by my ISP, which was set to Bridge mode, so the TP-LINK could do the PPPoE and work as a router. And everything was working fine, till I desided to upgrade my connection to VDSL. So my ISP sent me a new VDSL modem-router, which is another one cheap s...t. I tried to do the same type of connection, so I set the modem to Bridge mode and connected the TP-LINK by ethernet. The problem is that I noticed that when TP-LINK connects by PPPoE, the connection speed is much lower, then if I set the modem to PPPoE and use the TP-LINK only as AP.What is ther reason for this, can somebody explain?