Star Wars Empire at War: Ok, it isn't actually a game a love, but it really should have been. Star Wars was basicly made for RTS's, and yet they still found a way to royally f#$% it up. The ground combat sucked like none other, and the rebels just got shafted in space.
Then the expansion came out, and they somehow managed to turn it into an even bigger pile of sh!t. The Empire got a couple more space heros, because they didn't have enough to begin with, the SSD which took forever to kill, and a Death Star that could kill capital ships. The only advantage the rebels had (and you can't even call it an advantage) was weakened when the number they could have in a raid was decreased.
And for good measure, they decided it was a good idea to throw in the Corruption, the cheapest, most unfair race ever devised, and they weren't even cool. They got basicly unlimited resources, and weapons that were pretty much cheating. Their magic mass drivers bypass all shields, killing the only other advatage the rebels had, their shields that couldn't be destroyed. And almost every unit, space or ground, had them. Plus their capital ship with the special weapon that could one-shot almost any ship hardpoint.
All in all, it should have been a good game, but a lot of things turned it into a steaming pile of sh!t.