Playing MHW discconects my Wifi conection

tried https://steamcommunity.com/app/582010/discussions/3/1745594817430299615/?

4. If using WiFi, switch to a wired Ethernet connection
   A wired Ethernet connection is recommended when playing Monster Hunter: World online. If you are already connected via Ethernet, try connecting the Ethernet cord from your PC directly to the modem, thereby bypassing your router.

try this
the real solution is here if none of the above works....in WIndows 10 there is this "Radios" feature that Windows 10 or apps has control over your Wifi driver or feature, and most of the time if your computer wakes up from sleep or hibernation and suddenly your WiFi card goes missing, blame it on the NEW WINDOWS 10 PRIVACY of RADIO CONTROL IS THE CULPRIT. I faced this problem and went through a lot of websites and none of the solutions provided by them works. In the end, i found this RADIOS feature inside Windows 10 Privacy settings as I was looking to disable other privacy feature, but was surprised to see this in the Privacy settings. After this was set to OFF or Disabled....my WiFi driver works wonderfully and I do not have to restart my computer to get the WiFi to work. Other than that, some BIOS do have this "Allow OS to control WiFi driver"....Disable it!

Playing with kb?

If I had to guess, either your router (more likely) or your pc wifi card (less likely) sucks and is getting overwhelmed by MHW's traffic.

If you have a coax connection available but not ethernet, you can look at a MOCA 2.0 adapter. It's like magic, pretty much just as good as ethernet. Will cost you $80+ though.

If no ethernet and no coax, can look at powerline adapters. I've heard there's some decent ones these days.