This is probably old news to most people but I’m posting here in case it helps anyone else! Turns out there’s a power management setting you can disable that really improved the wireless reliability for me.

You first have to enable Developer Mode in Settings > System. Then you should see a new menu right at the bottom of the settings list called Developer. Under Miscellaneous you should see the option Enable Wifi Power Management.

Turning this off completely solved the problems I was having with Wifi being either really slow or dropping out completely to the point where it was almost unusable.