You can hope to do something about "how stupid people are", but only in the long term.

In the immediate term, where the election is tomorrow, Recognising that it is only a small contribution towards staving off disaster, and acting to make other choices possible is far more important; Disliking both intensely for their corruption and self-serving bias; Holding your nose so hard it turns blue, vote B, vote B, please vote B.

(edited following parent edit)

Let's abstract this into a simple game:

Imagine that there are 100 agents each playing this game, and all are presented with the same choice at the next iteration:

• A) Add 500 snargs to the polunk.
• B) Add 400 snargs to the polunk.
• C) Add 25 snargs to the polunk.

The polunk currently has 500 snargs in it. Once the polunk has 2,000 snargs in it, each and every agent playing the game will be cast into the outer darkness, where they will be forced to sort Precious Mao buttons for all eternity while ferocious rabid weasels gnaw at their extremities.

It is now time to choose. You know from polling that approximately 25% of the agents will tend to pick A, and approximately 20% of the agents will tend to pick B. The remainder have an equal chance of picking A, B, or C.

So which do you choose: A, B, or C?