It's the system itself. The system will have to be burned down to effect any real change, and frankly I don't look forward to what that will mean to ordinary citizens. Only when carrying on with the system is worse than that, will anything happen.
While the system still exists, it will crush or assimilate any challengers who appear. There are also plenty of containment phonies, like Farage, to contend with. 5+ years ago he seemed promising but like Trump he's just become part of the swamp.