I would frequently walk home from Fremont to Ravenna because it was 2 AM and there was no way to get home aside from getting in a cab (and good luck competing with the million other people trying to get a cab that time of night), or waiting maybe an hour for a bus to maybe come by when it was supposed to. At least in SF there was no illusion of public transportation to get me anywhere very far after midnight.
As to why it's a "shit show" as compared to other cities, Metro is constantly in limbo and notoriously unreliable. Didn't they just cut a bunch of routes because of budget shortfalls? http://metro.kingcounty.gov/am/future/service-cuts.html
EDIT: The whole reason OBA is/was even remotely popular is because of how notoriously unreliable buses are in Seattle.