I would look into Buddhism in Daoism since they talk a lot about attachment and desire, where it comes from, and how to overcome it.

But the reversal of consunerism has to be important enough to you to overcome the pleasurable sensation you get from using these products.

I meant practical advice about how avoid megacorporations, not philosophy

Well less consumption means less money to megacorps. You could also cancel your prime account and walk to the local shops etc.

I think we are all more monkey brained than that and having these products thrust upon us makes us susceptible.

It is another push the blame on the individual thing like carbon footprint or identity theft.