I think the way to look at it is it is "Totalitarian Capitalism" is problematic! What I mean by that is it is the application of Capitalism without conscience, ethics, morality, and/or compassion.
Capitalism has proven to be a very effective economic system and made our country great! However, as you mention, it is now, too often applied with an eye towards "the bottom line" (maximizing profit) while turning a blind eye towards the ethical and social effects. If you are a corporation, you can argue that your obligation to your share-holders is to maximize profit, and in that context, establishing a monopoly and controlling the market might be considered a brilliant/clever strategy! A generous way of looking at this trend - the problem is we have smart business majors who are brilliant in their understanding of markets/business, but oblivious to the rest of the picture.
Totalitarian Capitalism is a bad thing; however Capitalism applied with Wisdom seems the best system there is!
I don't think you can correctly argue that Capitalism is categorically a great system. WW2 has been a major influence on your lives and it gave Americans a sense of "we're in this together" that resulted in a period of Capitalism being applied with some responsibility towards society. As the influence of WW2 has dwindled, it has become more about maximizing individual (or corporate) benefit with less regard for the damage done to others!