Few tips,
I know you may not like this, but I'd like you to first try with USB connection streaming to make sure the PC is ready for debugging wireless setup.
It's always hard for us to provide direct suggestion on any of the network settings.
I also have an AXE11000 handy, but I have my PC tethered to the router always to provide steady connection.
Also check with the network monitoring software or other PC monitoring application, turn them off may help.
VR is very sensitive of package lost or frame lost, that's why dynamic bitrate is designed to keep the network performance rather than keeping the image quality stable.
It's more like an option to choose performance over visual quality. So, I'll also suggest lowering the bitrate first with dynamic bitrate turned off first.
I can only suggest this much based on the limited information above for now. but I'd be happy to help you through fine tuning the settings that’s suitable for your environment.
No guarantee though, Cheers.