Earlier quoted context omitted.
So how do you suggest we solve the problem without collective actions? What "changes on an individual level" do you think need to occur, and how do you expect them to come about? Because to me, it seems like the individualist's prescription is just to judge people for making bad choices and hope they make better ones in future.
The individual is the functional unit of society. When you choose to address society, what you’re really doing, if it’s going to work, is addressing the individuals of that society. Address a bunch of individuals. Or address one individual and have him address 2 people he knows. Etc. More than one way to skin a cat... TLDR; to skin a society of cats, one way or another, each individual cat needs to get skinned.
And therefore, many choices which would improve society only make sense as collective choices. An individual deciding whether to delete their facebook account is deciding between privacy violation or social isolation. In that context, the privacy violation might actually be the better choice for the individual.
When people criticise that choice, they're noticing that collectively it would be better if everyone made a different choice. But it's pointless to blame individuals for not making a collective choice. If we actually want people to make that choice, we need to act collectively, and transition away from facebook in a coordinated way.