Because they acquired the tools to observe the system and understand how it works and why the decision makers do the things they do.
Until things change, this is a 2-party system set up to exclude any opinion that cannot be voiced within that context. On one hand, you have a group of people who have written off large sections of the country and have decided to game the system to stay relevant (GOP); on the other hand, you have a group of people who try to represent a very wide range of folks who don't recognize themselves in the first group (Dems).
You sit on the sidelines and talk about "they ain't doing nothing for us!" When proven otherwise, you say "that's not enough." When shown that it's taking us in the right direction, you disparage the messenger.
You're just a professional complainer.