I have used the bus to get to work for 2 years and I only have 2 complaints. First is it is too hot to wait for a bus in the summer months and second are the men who think it is acceptable to stop their cars while you are waiting and expect you to hop in for whatever they imagine you are selling.
I have never been late for work and always get a seat to myself on the bus and the drivers are very protective of women travelling alone, particularly western women. The only rude and aggressive people i have encountered have been women. I have not encountered any of these problems from Qataris, either men or women.