Hi, Im not sure if anyone can really assist with this but im going out my mind. This is a home set up, using one 670 via the cloud. I have numerous smart devices, most are Shelly or Tapo, the odd Matter and 2 Tuya devices.

I have FTTP of 600/600 and I get this if I hardwire. Wifi I was getting around 500 until just a few days ago but now im getting anything from 8 to 90Mbps and I cannot work out why.

There is approximately 50-60 devices joined to the wifi.

The wifi was 2.4Ghz and 5Ghz but most of the Smart devies only use 2.4Ghz, so I made a second ssid leaving all smart devices on he first one and making it 2.4 only and the second ssid 5Ghz only, but this doesnt really seem to make much difference.

I'm new to the cloud so still getting my barings around it. Is there a way to download logs that someone with better knowledge could look at with me? Can I see if a device is bringing the speeds down some how? 

Any advice would be greatly received, thank you.