VHawk,
Things change over time through action, not inaction and withdrawal from the process. Women didn't gain the right to vote by doing nothing about it, advancements in civil rights for African Americans and LGBTQ citizens haven't been gained through inaction.
As far as what advancements have been made and how to judge them, one poor election result doesn't mean the entire system doesn't work and no advancement has been made. In 2008 gay marriage wasn't legally recognized by the federal government, now it is and is legal in all 50 states. The president-elect who came in on a conservative wave called it settled law.
This polling is currently at record highs. That is progress.
Recreational marijuana is now legal in 8 states, and medical marijuana is now legal in 20 additional states. 8 of 9 ballot initiatives regarding legalizing Marijuana passed in the 2016 election, and
a record high 60% of Americans now support legalizing marijuana. That is progress.
From that same link, 86% of Americans now support universal background checks for gun sales, and 56% of Americans support raising the national minimum wage. That is progress.
These are just a few items. But to deny that any progress is or has been made in the current system through persuasion and action is a lie. To withdraw from the system without any plan and just expect things to change through your inaction is a fool's errand.
So while many of us may be open to the idea of disrupting our current system under the right circumstances, the reason the two major parties are so entrenched is because this is a herculean task to figure out how to disrupt the two major parties. It takes massive amounts of funding and will be done through a "people's party" effectively targeting local elections where they have the ability to gain a foothold for their party, not through one fell swoop of taking the presidential election without any infrastructure. Until a time where that is feasible, the best solution is to continue to work for progress through the current system.