Only 35 Senators are up for reelection this year, I assume you meant the House, not "all of Congress". (Note that all of the House is up for reelection every election term, and it doesn't change very quickly anyways.)
Most sane people will not hinge their vote on Internet politics. Things like healthcare, their views on whether or not killing babies is okay, if it's totally cool to be racist in 2018 or not, etc. will tend to take precedence. As those things should, because those things affect people's lives, not Google and Netflix's bandwidth bills.