Daily disconnects hindering my ability to work (streaming)

Hello, for the past few months I've been getting daily disconnects and when my download doesn't disconnect, the upload speed goes to practically 0, meaning I can't do my job which requires a consistent upload speed and absolutely no disconnects. It mostly happens in the afternoons and evenings; late night and mornings seem fine (though it can happen then too) 

At first I thought it was just peak hours traffic in my area, but the full disconnects have become unacceptable, it directly impacts my ability to work. 

I had an engineer visit not too long ago, who checked the modem, wiring and my ethernet connection to my PC and he said everything was fine, all he did was remove the noise filter thing that connected to my HUB5.

I've just set up a BQM to better track it, but here are my upstream and downstream stats directly from my router. 

Just ask if you need any more info providing, thank you kindly 

[MOD EDIT: Images removed due to containing private information]