@Ahmadkhan Go to Network -> Internet, and try setting the Network Negotiation to 100Mbps. It could be the connection is auto negotiation link speed of 10 Mbps.

@Ahmadkhan Okay, lets try backing up your configuration (System -> Backup & Restore), and then do a factory reset from the same menu. Once the router resets to factory settings, try using checking...

@Ahmadkhan Okay, then that means the issue is indeed coming from the router. Can you check if you have not enabled the QoS (Quality of Service) option? Or the bandwidth limitation?

@woozle Well, the antenas are in the same direction, the router is literally on the same place as before. Antennas are slightly bent, at about 10-15* (not completely vertical). I know that the waves...

@Ahmadkhan Did you try with the laptop plugged in directly with the cable, without using the router (the cable which goes into the WAN port of the router, to go into your laptop)? If yes, and you...

@woozle Its the EU version tho.