extremly slow wifi belkin model f7d1101 v1 basic wireless usb adapter

so my WiFi is 50 mb/s on my phone and etc when i run a speed test my net gear did not work so i had to find a different WiFi card and when i download something it goes to 1mb/s to 15 kb/s and sometimes it will work fine and 5 minutes later it is broken again it works fine on windows for me and yes i have tried all of my usb ports still the same i don’t know if it is the drivers just being badly made if any knows how it fix it or feels like coding better drivers it would help a lot sorry for my bad English btw