One pet peeve that gets to me is something that's done on a lot of commuter railways and S-Bahns, the 10/20 minute schedule. The schedule looks like:
2:10
2:20
2:40
2:50
3:10
etc, when it should be like this:
2:10
2:25
2:40
2:55
3:10
This minimizes waiting and allows for frequent service every 15 minutes.
What are your pet peeves?
Adding to this, I hate transit stations that don't have ticket machines. The BRT station near me has an indoor waiting area, wifi, an arrivals board, but no ticket machines. Gotta go to some random convenience store almost a kilometre away to reload your card instead. Why do they do this.