I completely agree, and I wish people talked about this more. Even if you ignore all the manipulative messaging of the advertisements themselves the fact that there are now posters everywhere telling you to buy things, do things, be better than everyone else is corrosive in itself. Nobody is paying for an advert that tells you "you are fine the way you are, you don't need to buy anything, you should go for a nice walk in the park, it's free".
I've thought before about how the west basically abandoned religion and instead now we just get preached at by corporations and advertisements instead. Whether you like the idea of Christianity and religion or not, at least the message of Jesus was "everyone is equally loved, don't try and be superior to others, don't cling to material possessions". Now instead of just getting preached to at church we get preached to all day from all angles, and the message is the complete opposite.