Generally speaking, people often use themselves as the benchmark for their own standards in a simple bid to preserve their ego.

If someone isn't very good, more often than not they will have standards matching their own skill-level, and have difficulty seeing this problem as they are looking from the inside out.

My own stint on EU was nightmare inducing; Wipes to the final boss of Heroes Gauntlet were almost a daily occurrence, typically instigated by someone with the French language tag on ._.