Neil Williams wrote:

3) The constantly block pedestrian crossings.

Only due to poor driving.

Yes but multiple experiences suggest that in general either the buses are
difficult to drive for the standard bus driver in London or that they are
often assigned the worst drivers - hence the problems with overheating
amongst others. Drivers on the 25 have an annoying tendency to stop the bus
at a middle of nowhere spot between Bow and Stratford and not tell the
passengers that they'll have to wait ages for a driver changeover - the very
opposite of customer service.