Purely numerically comparing it, assuming slavery counts as a life spent in suffering, and there's a 1:1000 factor, given a forty year life expectancy, Google must cause the equivalent of 14 slavery-equivalent-suffering-days or more to be worse.

How many days of back-breaking labor and abuse would you put in to get freedom from Google tracking for the rest of your life? For me at three days, it'd be arguable; three weeks would be a stretch. (Of course, I have no actual experience to compare.)