This is hilarious! 
Seeing “stock adapter and cable” in the diagram still makes me wonder about power issues, especially with cameras mounted outdoors, since my understanding of the adapters themselves is that they’re rated for indoor use only. I wonder if you’re using only what came in the box with the cameras or if you’ve ever tried a Wyze Outdoor Power Adapter, since Wyze says this is required for outdoor use. I think a lot of people probably use the included (non-“Outdoor”) power adapters in outdoor applications, and that’s probably okay as long as the adapter and connections are adequately protected from the elements/weather. I’m just thinking it’s an additional consideration, going back to when you wrote this:
I think you’re on the right track trying to improve the Wi-Fi signal, but I also wouldn’t entirely rule out power as part of the problem just yet.
I use both Mozilla Firefox and Google Chrome on Linux, though Firefox won’t stream Cam OGs (at least not the last time I checked) and isn’t a supported browser for Web View. That may not be a significant issue for you, but I wanted to pass that along in case you weren’t aware since you mentioned using Web View.