I've only played starcraft 1 for about 5 minutes total.
I wouldn't say that's enough time to make a fair judgement.
From all the Blizzard games I think Starcraft 2 was the worst.
It was just like starcraft one but with alot worse scenario, a lot worse multiplayer and the graphics of warcraft 3 (almost 10 years outdated).
The graphics weren't
that bad. They're a lot better than WC3's graphics if you turn everything to full detail, and if you can't, that's not the game's fault.
The scenarios were a lot more interactive and less about just building up a force and wiping out the enemy. Except in multi-player, where the same old strategy still applies: build a mass of troops and zerg the other player.
I wouldn't say it's the worst thing they've done, unless you are referring to only three currently active franchises, but they have come out with many worse products if you go back to early Blizzard or even back before they changed their name from "Silicon & Synapse". Look at some of the crap they made for SNES, MS-DOS, and Genesis, which of course aren't impressive now, but even back in the day were a joke (see "Blackthorne", "Rock n' Roll Racing", "Justice League Task Force", "The Death and Return of Superman").
