Tech problems (either in online ordering or at in-store checkouts)
Ha ha, THIS! And not just on BF. Twice in the last week I've had online ordering issues.
I thought it was supposed to simplify life, but not so.
When advertised deals don't show up in online carts and you have to spend an hour on the phone with tech support you wonder why you bothered.
And when you order one item and instead they send you five of a completely unrelated item that you didn't order, and you have to drive down to the store to rectify the situation, you wonder, "What are they smoking in the warehouse?".
And then there's Amazon and the inability to do a straight exchange for a faulty item sent. You have to return and re-buy, but usually the price has gone up by then so you're forced to pay a higher price for their error.
Just endless complications...