what!! how is it a bad game!! Warcraft 3 is really good+fun, well-designed, nice graphics. it has moddability that extends playtime by massive amounts making it more worth your money, allows for micro+macro gaming styles, easy to pick up+difficult to master.
downsides: metagame has evolved to such a point that playing on b.net you must be super pro to score any wins. players not used to working with hero units may stumble with them. gameplay too slow??
edit: Strategy games are the best games. Read more Sun Tzu, chump
edit2:
Which, unlike Warcraft, is actually a good RTS instead of a real time clone of Heroes of Might and Magic.
is really dumb to say, anyways. Besides Age of Empires being a kind of mediocre RTS series (also my favorite), Warcraft 3 and Heroes of Might and Magic share the similarities of allowing you to recruit units. No city-building, or upgrade researching, or resource gathering in HoMM.