wifi packet loss

I recently bought a tp link TL-WN881ND pcie adapter and a cudy WU1400 usb wireless adapters. Both of these adapters don't have any stable connection whatsoever. They constantly cause packet loss, even though I'm 20 ft away from the router. I pinged google.com and they're near 50's. But they...

For a while now I've had issues with my wifi, where every few seconds the receive would drop to 0 mbps. See link: View: https://imgur.com/qPu9MDY Eventually I bought a new wifi-card (TP-Link Archer TX3000E) and it flattened out the receive graph. Although it did seem to help, my internet in...