Hey TP-LINK !!

Why 2.4 GHz is always slow for me? When i do Optimization from Deco App so the App said everything is fine and there is no congestion but 2.4 GHz is working too much slow for me. I tried to reboot my Deco System, Turned OFF Mesh Technology, UPNP, SIP ALG, Fast Roaming and Beamforming but nothing changed on 2.4 GHz but there is no speed problem on 5 GHz WiFi. Why Optimization option is useless in Deco App. Please fix it by providing me beta firmware for my Deco Mesh System.