Cause Virgin is hiding their service as VDSL. CRTC asked for Bell to give their service to wholeseller but Bell don't want to. As soon as the CRTC force Bell to give their service to 3rd party, upload speed will go up.
https://mobilesyrup.com/2016/09/20/crtc ... -internet/
http://www.cbc.ca/news/technology/crtc- ... -1.3350885