It all depends of course on the level of your paranoia/threat model. To prevent standard data leaking or rather stealing like in this case, linux is a quite so

It all depends of course on the level of your paranoia/threat model. To prevent standard data leaking or rather stealing like in this case, linux is a quite solid choice. But if you think you are a high profile target, you should probably learn how to deactivate Intels ME and co. And if you are really paranoid, you should assume that there are hardware backdoors. But what do you do then? Build your computer from scratch?