The problem is the same as for a business which needs to make a major change that will tick off customers and lose business until a critical point is reached, w

The problem is the same as for a business which needs to make a major change that will tick off customers and lose business until a critical point is reached, when things will suddenly get much better. Voting third party leads to the more acceptable major party losing and the more-evil party winning more power until enough finally support the third party enough to win. This process rarely goes well.