If you don't enjoy a place, maybe you don't know enough about it. Seek the truth. Recognize tourist traps. Give a culture the benefit of your open mind. See things as different but not better or worse.
Any culture has much to share.
Of course, travel, like the world, is a series of hills and valleys. Be fanatically positive and militantly optimistic. If something's not to your liking, change your liking. Travel is addicting. It can make you a happier American, as well as a citizen of the world.