In fairness, when you sit down and look at any three year span of a network it looks like this. Even stuff that has high batting averages like Showtime, HBO, Starz, FX, AMC etc.
I think one story of recent years has been as much broadcast stepping up to better meet the cable networks and Netflix/Amazon/Hulu in terms of risk taking which has, with cable, sucked the air out of the last three's original burst onto the scene a couple years back. Their main selling point was that they'd take those risks.
Hulu's was hilariously bad from the start though, I think half of it was British shows that couldn't make it on any of their channels which will put any six episodes of garbage on.