Well the United Nations was created to "prevent wars" seems we still have quite a few going on

Each browser out there has issues of one type or another bar none.

As soon as you think you have something looking good you find out it looks like junk in one of the other browsers so you have to make changes or add hacks so it looks the way you want it.

If your life/work is creating Websites it's probably a piece of cake, but if you just dabble in it or do it once in a great while it is annoying.