External SSD drive not detected as SSD drive
I'm using the monitor USB hub as a connector, could it be an issue? 


Yes, that's probably the problem. Based on the speeds you're seeing, I suspect that the USB hub in the monitor is a USB2 device; connecting your drive through that hub is slowing down the connection to USB2 speeds.

Connect the SSD directly to your computer, or use an external USB3 hub.