They stop and wait in the station until their time arrives (in the middle of the route), with 20 people on them, wasting everyone's time. That's just incredibly dumb planning. I get that the point is to be more "reliable" and "on time" but what's the point of being accurate if you're so slow?! At some points Google maps suggested we walk half an hour instead of taking the bus because the bus was slower.
It takes some really funny priorities to reach this point. I haven't seen anything similar anywhere else, a bus stopping and waiting with people inside. And it wasn't something rare, it seemed to happen pretty frequently.
It seemed like they are artificially padding the accuracy metric by actively slowing the buses. Their schedule is far slower than their average pace, and then they slow down everything. You get that the worst case timing is now your average timing but "accuracy" increased. That's Goodhart law in full effect.