I'm pretty sure I just won the award for worst internet
The best part is, I failed the test 7 times in a row before it finally completed. Kept getting errors on the latency and upload tests
You might want to speak with comcast about that. It is terrible, and it might be the fault of your router.
You should have them replace the router to see if it fixes things, because no cable modem should be that slow.
Another possibility is that you have multiple firewalls and/or virus programs running. If that is the case, reduce them.
One test you could make is to disable all virus and firewall software and try the test again. That should let you know if it is your software or router that is to blame.