What, precisely, is the “threat” that Google presents that does not rely on a government to be the muscle. Are they going to cancel your Gmail account? Cut you off from YouTube?
Surely if they actually are as powerful and dangerous as you think they are you wouldn’t use their stuff at all. But then I guess they wouldn’t be all that powerful if you could just stop using them…
Try that with Google, PayPal, Amazon, Apple, or any number of other companies when an error they've made but refuse to even explain, much less fix, threatens to wreck your livelihood.
To redress grievances with my government, I don't need to make the front page of HN or go viral on Twitter. We don't go a week around here without another front-page lamentation to appeal for noblesse oblige from one of these intentionally-faceless megacorps. That's not how you should have to deal with a company you're doing business with... but it is how you deal with a dictator who leaves you no other choice.
"Does entity X have a monopoly on violence?" If yes, they are a government. If no, they are not.
Whether X is nice or mean, important or unimportant, is irrelevant.