OK, to recap:
Real basic set-up--ordinary PC; No wi-fi, no splitters, direct line to computer.
Main Shaw and internet modems unplugged as per instructions, all connections checked-- no improvement.
Multiple Speed test results:
Pings from 55 to 9, usually in the 30's
Download no more than 1.1, usually 0.1-0.4
Uploads never more than 0.1