Simply becuase these players hadn't learned them. That's when all these complaints increased massively. Rather than spending 10 hours on the low rank servers, learning how to play wrong then getting thrust into the normal game with the wrong expectations. Simply becuase the new players back then saw these tactics day one and learnt them.
Before rank limits were added there were far less complaints against valid tactics. They get you into bad habits that are hard to break out of and will ruin your game experiance. Some slow learners refuse to learn at all. There are two kinds of players in this game. There are far more tactics to use and everyone can fill their own playstyle. The fluidity and flexibility far outshines anything mount and blade has to offer. When you play chivalry you will see the emptiness in MnB's combat.
However they are very much prevalent on the steam forums and constantly listen to the players. The devs aren't listning to the steam playerbase.