Thank you for that tech data. I'm seeing no significant interference on the wifi0 radio, but I did see some interference on the wifi1 radio. I sent you a picture so you can see what I'm referencing, we're seeing a 29% rx retry rate and a 23% CRC failure rate. This means that 23%-29% of your traffic is too damaged to receive and has to be resent at least once, likely more than once, before the receiving radio can read the data and move on to the next set of packets. That will cause some slow down on your network, but since the wifi0 radio is fine, I don't think this is your main issue. That said, this guide reviews some steps you can take to mitigate interference, if you're interested: https://thehivecommunity.aerohive.com/s/article/Radio-Frequency-Interference-Troubleshooting
Otherwise, I'm seeing that you have QoS enabled for some of your users, and that we're using Bonjour. These functions have been known to slow the wireless down. As a test, would it be possible for you to create a new temporary SSID without QoS or Bonour enabled, to see if you have the same speed issues without these features in production? That will let us rule these out as the issue, or help to narrow down what we need to troubleshoot. I'm not saying that we can't use these features without slow down, but if we find that the wireless speeds are better without those settings, then we can see what we can adjust within those features to help with the wireless speed.
