You should read Good to Great.

Dear Walmart -

Sometimes it is hard to like you.

Your carts are faulty. For a while I thought it was a quirky little thing about me: I always get the bad cart. But I've realized that I never get a good cart. Your carts need repair.

Your employees, while not necessarily rude, are improperly trained. Recently I asked 4 employees the same question. Each person respectfully told me they didn't know and referred me to another employee. Your employees need cross-training.

Some of your employees are rude.

But I do appreciate your low prices.