They never seem to build buses with the passenger in mind. Bus drivers don't always unlock the rear door. Bus drivers might be in a catatonic state due to drugs, and pass-up passengers at bus stops. RTD can say that they have taken steps to correct any extant problems while basically ignoring reality. Good luck getting any improvement.
Bus drivers can be very rude.
They talk down to you if they think that you are doing something that they think you shouldn't do. I was once on a bus that was so crowded, that I only had access to the rear push strip, which was ripped off. RTS back doors lock ajar upon opening. Wheel-chair lifts Bell or buzzer cords or strips sometimes don't work. Of the few bridges in West Los Angeles that fell during the recent earthquake, one of them fell over the West Los Angeles Bus Station, where passengers wait under the bridge for a bus.