They get more votes because when you only have two candidates, and both are appealing to the right, the one who is fully right wing will beat out the one that is offering half assed attempts at pandering. And that isn’t even beginning to get into the propaganda from the right that Dems are nothing but sleezy liars who will say anything to get their way, and then the Dems literally start doing that, won’t win over anyone from across the isle.

A simple analogy is you have two cake shops, both selling for the same price (a single vote). One advertising a generic square cake and the other a three tier masterpiece with all the bells and whistles. It’s quite obvious who is gonna get the most customers.

Meanwhile the rest of the population gets further and further disillusioned with the system and stops participating when its obvious that it doesn’t care to represent their interests.