punctuality is a problem

my personal experience last Wednesday: I was waiting for a monorail at KL Sentral to Imbi Station. It was 6.30PM. Waited for 15 minutes.. still no sight of train. Then a train came, but it halted about 50m from the station for 5-10 minutes for no reason.. then it went backwards

5 minutes later, another train came but the announcer said this train won't be picking up passengers

Then waited another 5 minutes, finally a train came

I arrived at Lowyat Plaza at 7.20PM, took me about 50 minutes from KL Sentral.. I think I'd reach there earlier if I was on foot!