Dell Inspiron 5370 WiFi Card DW1560

I've bought a DW1560 M.2 WiFi Card (BCM94352Z chip) but I get very low speeds. With my stock QCA9377 I reach around 15mbps but with the DW1560 I get around 5mbps. Is there any alternative to the DW1560? I have a 40/50 USD budget