On the Internet 150 plan. Not the account owner, but a tenant. Recently accessing some websites (namely Reddit) became incredibly slow. I tested a bit on 2 devices (Windows laptop and iPhone) and I think the issue is with Shaw's connection to Seattle, or some CDNs in Seattle. Take a look at the following test results:
I also tested other cities:
Any help troubleshooting?
Edit: A test to PNAP-SEA, by Internap Network yields 0.4MBPS! This one is from netperf.tools, all other networks in Seattle there yields good connection: