It's difficult to evaluate heroes like that because a single hero might be bad in one metagame and better in another, and the meta is dictated by the overall balance between the heroes and the particular quirks of each team.
That said, there are definitely some stand out "bad heroes" that haven't been buffed because Icefraud doesn't know if it's a numbers problem or a design problem, and remakes take a while.
If I had to make a list it would be something like:
Doom
Broodmother
Necrolyte
Timbersaw
i played brood once
kept getting dust ganked
i agree with your assessment that she is the worst hero ever