Of course they won't let you alter the terms of the agreement, but everyone always has the option (barring some sort of malicious state-enforced intervention) to walk away and divest themselves away from platforms and ecosystems that don't respect their privacy or otherwise act in ways they do not agree with. Or at least if it's going to take a long time to get there, one ought to start thinking about how to go about ensuring that escape hatch is available if their entire life's data depends on someone else continuing to provide them access to their "cloud" services based on potentially arbitrary rules and changing conditions they may never know about or be able to audit for themselves.

If there were enough people out there to stand up and make a difference by going somewhere else and hitting these companies where it hurts (stop giving them money and personal data to mine), then maybe it would start to make a difference.