There's a housing estate near me that was built 10 years ago or so. It's got lots of cycle paths but they *all* continually swap from one side of a road to the other, and force cyclists to stop and give way at junctions.
When visiting there, I *always* cycle on the road because it takes a quarter of the time, and it's also safer because none of the locals indicate at the junctions, meaning that it's impossible to know whether it's safe to cross a road at a T-junction.
As far as I can tell, a lot of cycle infrastructure is designed by planners who never travel by any means except driving.