Uh...because more liberals use Google than conservatives, and Google can afford to discount the negative feedback from conservatives while retaining their liberal base of users. Honestly, I don't think Google gives a feces about conservatives ripping on them. They're still the #1 search engine and the owners are billionaires. Yeah, we're having an effect on them.
Do you imagine a service that is looking to satisfy their customers would like to just sit around until, all of a sudden, all their customers merely disappear?
So, your idea is the virtual equivalent of marching up and down demanding that Google acquiescence to conservatives.
That's not adhering to conservative principles, that's knee-jerk liberalism.
Don't you imagine in that dim little brain of yours that this company MIGHT want to see how their customers FEEL about their company here and there???
Well, my dim little brain (hang on a sec, it's going to take a while to process the information from my dim little brain) already said that Google doesn't really care about conservatives dissatisfied because they won't put up a Memorial Day graphic on their webpage.
Let's see - Memorial Day is honored on various FR threads, by the government, by other webpages, and by millions of families, and all a handful of conservatives can do is get mad at a website because it won't display a cute little graphic honoring the fallen.
Shouldn't you be out checking the steak on your grill or something? Chugging a cold one with your friends? Who cares about Google, right?