Usually when I see someone bring up "both sides" it's a conservative like you trying to make people criticizing the democrats seem unreasonable.
Both sides are capitalist and conservative, but of course there are differences. Don't you want more differences?
If you really get people who often "both sides" you, do you wanna know how to shut them the fuck up? You put them in the game! You force them to put their words into action by passing electoral reform. Doing away with First Past The Post voting, getting rid of tge spoiler effect, and make third parties viable.
Make them prove it. Force them to show us how it's done. It's so easy right? Force them into the game and they won't have any "sides" to complain about.
More democracy is the answer, not hoping they vote for your guy.