The one characteristic of fringes is they tend to look for a White Knight to save them. As you so ably point out they sit on their rumps while complaining that no candidate is doing right.
They do not recognize that politics is a never ending job of persuasion and compromise. What the fringes of the left and right long for is a benevolent dictator to come on the scene and overrule the ignorant majority that decides elections. Their dictator would rule by fiat put the good and the right in place...as they see the good and the right.
That is the appeal.. they want a strong leader to set things right. That is a definition of a ruler. Hitler ruled, Stalin ruled, Mao ruled, and Castro rules. Do you think Hitler woke up one day and said,"My goal in life is to be an evil dictator. My goal is to kill 50 million people and go down in history as a terrible mass murderer?" Of course not. Hitler saw the world from the position of the left fringe. He was the leader of the German Workers National Socialist party. The acronym for Hitler's party is NAZI. Hitler was as socialist as Stalin.
His motivation was to rid Germany of those he felt were bad, and conquer the world for those he felt were good. He was elected in 1933 because the German people thought he was a strong dictator who would take charge and fix the depression.
Fringes are always frustrated with the two steps forward and one step back with lots of side steps comon to democratic poltical movements. Fringers can't tolerate a leader who bends to the will of the majority. They see all elected leaders in a Republic as failed dictators who do not have the ability to dictate. They see the inability to order things done, and the necessity to bend to the will of the people as a weakness of their brand of leadership.
Fringers will deny it, but they crave a dictator. Yes, they crave a benevolent dictator but a dictator never the less. Power corrupts and absolute power corrupts absolutely. That is true and all dictators eventually become corrupt. Mostly they do it sooner rather than later.
The slow arduous and difficult task of getting things done in a representative republic is abhorrent to the fringers. Fringers have no patience. They want a dictator to dictate and dictate now.
They haven't a clue about what would happen if they were successful. They would be among the first people killed by a successful dictator. For the first time the dictator dictates something they don't like, they trash the dictator. The dictator has them killed to protect his authority.
The best thing that can happen to a fringe group, is to never be successful. For fringe members Success, and Death are synonyms.