Salespeople
I have an inherent dislike for and distrust of salespeople.  Salespeople, for all intents and purpose, are weasels.  It's not their fault.  It's their nature.  Anyone who has something to gain or lose based on the outcome of a certain situation is a weasel.  They can't be trusted.  They can't be believed.  Anything they say or do has at least some sort of bias in it.  They want to sell you something, oftentimes something you want and/or need.  But they're not looking out for your best interests.  They're not trying to give you the best product for the best price.  If they were, they'd recommend somebody else.  And then they'd lose their job. 

When I buy things, I like to be the one in control.  I like to look at items on a shelf or on a webpage, where I'm free to decide at any moment to forget all mention of a purchase or a sale.  As much as it annoys me, I'd rather tell the salesperson who asks if I need any help, "No thanks.  I'm just looking." 

Salespeople seem to always be involved with big-ticket items.  You can't buy a car without being weaseled by a salesperson.  You can't buy a house without dealing with a realtor.  And I've found that you can't buy windows for your house without being pushed and poked by a salesperson.  It gets me to the point where I'd rather just not spend my money and let my house fall down because of old and rotting window sills.  Salespeople make buying experiences miserable. #business

Nothing I can do
"I'm sorry, there's nothing I can do." 

This has become my least favorite phrase in the English language.  No other statement admits as much weakness, ineptitude, and uselessness as this one.  I often hear it after hours of phone calls to customer support, often after several transfers and several more dead ends. 

The reason this phrase makes me angry is not so much because certain people legitimately don't have the ability to perform certain actions, but because the people who use this phrase often use it as a way to end the conversation, a way to get me off the phone.  It's not that they can't do anything, it's that they don't want to.  And even if they sincerely aren't able to do anything, these types of people are often not even willing to recommend a course of action or a person to contact.  It's the attitude behind the phrase that really gets to me.  "I'm sorry, there's nothing I can do."  It's more like, "I'm not really sorry, loser jerk, but I have no desire to continue this conversation or to help you in anyway." #psychology