@Carl Yes, I believe it is a gateway. I switched to AP mode and thought that the ping was better but it is still spiking to over 2000 ms. Unfortunately, I only have access to an ethernet cable coming...

We just purchased a Deco S4 because we were experiencing very low speeds and bad ping, most of the time less than 1Mbps down and almost nothing up with 300+ ms ping. After installing the Deco speeds...