As long as you can vote, the system can be fixed. If you don't vote the system may get to a point where it can't be fixed.
If you want that outcome go watch the movie Civil War. You're likely to be one of the people in that refugee camp, or maybe in a mass grave because you're the "wrong kind of American". That's the kind of shit that happens when the system is destroyed.
There is no perfect system, every system needs to be fought over, lest it gets overtaken by those working against you. Destroying the current system also destroys every benefit you already fought for.
Yeah, but if you want to destroy the system you need to have the military on your side, and they won't be, which means you'll need to actually defeat them, which isn't likely, unless you take a lot of bases... with an already existing trained force... all at exactly the same time... with a huge force... of loyal, extremely secretive, organized, huge, military...
Look, maybe if you're A LOT more politically involved. Like running for office involved and you really work those wheels of progress things can gradually be improved. Seems less fantastical.