My main gripe with ground handling was the trend in reduced turnaround times.
Low-cost airlines want it both ways, minimum time on the ground and impressive on-time performance. And sadly it can't always be done.
YES, you can turn around a 737 in 25 minutes. IF everything goes to plan, but sometimes delays are un-avoidable. 25minutes is not long to offload a hundred bags and pax, and get them all on. Sometimes there are going to be complications that you just cannot avoid. More often than not, these factors that cause delays are often only very minor delays of 2 or 3 minutes, but as far as the airline is concerned its a good excuse to issue a penalty to the agents and keep their own costs down.
Part of the reason I left the handling side of aviation was because at times, some airlines were willing delays and demanding the impossible. All with the aim of catching us out so they can impose thier penalties.
RTG!