I'll be amazed if router is the root cause for the PS blue screen error. Router is an external device to connect to the internet. That's it. It has no bearing on client devices such as PS4, PC, tablets, phones etc. Worst case scenario some of the devices do not play well with the router and not able to connect and get on the network or that the router is not able to keep up with number of devices and crashes. But I don't think router in itself can impact the client devices.
If a specific kind of router can somehow crash PS4, Sony would have had a s**t-storm on its hands by now. And I've had blue screen errors on PS4 (both DBC 17 as well as Ashes Cricket) and I'm using Netgear router but as I said earlier you are reaching when you think a PS crash is due to a router. Router should only result in "Internet" or "No Internet", nothing else.
I don't know why but any type of internet I use = crash. Internet off = no crash. I even tried with my phone as a hotspot with S8.
Internet = crash. No internet = game in the bin.