Shar is one of the most evil gods in the D&D pantheon. Way worse than even Lolth.
Setting aside the rest of what you say (some of which has merit, especially the last line), this is absolutely not true. Shar and Lolth are both evil deities; Shar is a Neutral Evil greater deity (the goddess of darkness) while Lolth is a Chaotic Evil lesser deity (the Queen of Spiders and goddess of the Drow, and once the elven goddess of destiny). You cannot directly compare how evil they are; but Lolth has certainly perpetrated much more evil as the tyrannical ruler of the Underdark.
Seems like you don't know FR lore that well. My comment has nothing to do with NE v. CE. Those definitions matter only in the cases of players playing the PnP game. In FR lore, the authors of that lore don't really care about "NE v. CE." Lolth has done a lot of really nasty things, but the impact of what she does is actually very limited, generally limited to only the Underdark of the Realms and not even to the Realms overall. By contrast, Shar's singular goal is to destroy the entire multiverse, to end ALL life in the multiverse. There is just no comparison. Shar is the greatest evil in the D&D pantheon. Heck even Bane, who is LE, has a much greater impact with his evil ways than Lolth. So whether they're chaotic, neutral, or lawful does not matter that much. From an FR lore standpoint, what matters is the extent to which each individual god's evil ways impact the setting. And there, Shar is the worst hands-down.
