XPS 15 9560 Killer wireless card is flaky

I'm posting here after contacting technical support by phone and receiving little help. The issue is my brand new laptop that I believed was off top quality parts has what appears to be an inferior wireless card installed in it. The Killer wireless card seems to lose the ability to discover and connect to wireless networks, especially after resuming from sleep. The only solution I've found is to restart my computer. This happens about every other day.

Unfortunately, updating to the latest drivers for all components in the laptop has had no effect.

Dell agreed to consider replacing the wireless card with a much more industry standard Intel variant, but ultimately denied the request (after delaying the decision for over a week).

Needless to say, I'm frustrated and will accept any advice on the matter.