Haha, "too difficult" would really show them up! I'm sure it's a difficult job, lots of thinking on the spot, and must get tiring seeing client after client. That's their problem though!
It is weak to put someone down to make yourself feel better, or make them "easier to deal with" urghhhhh. That's loads of people's MO... especially teacher's in my experience, bad bosses... basically anyone "in charge" that doesn't love their job...resentful parents...etc. etc. Just get their self worth from controling It's a mad world