I always smile when people on Facebook moan about the C2C service to Fenchurch street. One of the best train operators in the country IMO. Unless you get one on one of the last stops before London you can get a seat, very rarely is the service delayed by more than a minute and when it is, it's usually something outside their control (cars crashing into bridges seemed to be popular?)
Somebody could run the most flawless service on the planet for just 50p a day and people would STILL moan. Peoples expectations are generally unreasonable (But not always).