BCM94360CS2 Card + M.2 NGFF Adapter is too slow

[Theetech]

Folks & Experts,
I need your support WiFi & BT card (BCM94360CS2 Card + M.2 NGFF Adapter) is too slow.
(means to load a webpage it takes 5 minutes).
Same Page I load with USB WiFi Adapter works Blazing fast. Please help me.
My Settings & Components:

• Clover Boot
• macOS Sierra 10.12.6
• MSI H170i pro ac Mobo
• Intel i5 6600
• AMD RX580
• BCM94360CS2 Card + M.2 NGFF