Do I have the wrong impression?
It's a pity, because I've learned things from watching Curtis. The Bernays-Freud material at the start of Century of the Self is riveting.
One of his latest ones, "It Felt Like a Kiss" is a new direction for him and pretty interesting from what I saw of it. It's almost mocking his own style in some ways -- it uses the techniques of typical TV news media to show a series of absurd and shocking material, with the context switching rapidly enough that there's no chance to reflect on what you've just seen. I suppose it's a meta-criticism of the TV news medium, mimicking it in an extreme way to show how ridiculous and harmful it is. It's an exciting trip to watch, though the content is nonsense and it doesn't have a whole lot to say -- it's more just a way to get you to reconsider the usual media you might consume.
Adam Curtis does have political opinions about society. If opinionated films bother you, and particularly ones that lean left or are not decidedly right leaning, it may be worth skipping Adam Curtis' work.