Never understood why capitalism is seen as some enemy or something. Its, to me, a less than perfect system that those who take the risks can benefit personally, but only if what they offer is actually wanted by folk.
You are posting from a phone or a tablet or something that is a direct effect of a reasonably successful capitalist company.
Unregulated capitalism or as they like to call it 'free market economics' is about as close a system to social darwinism as you'll find. As an ideology it is absolutely horrendous - as a tool, it's probably the most workable framework that we have for an economy (as you said).
The problem is that so many people treat the health of an economy as being the end goal and it shouldn't be. A healthy economy is pointless unless there are good mechanisms in place to allow the wealth generated to be pumped back into society. These mechanisms are what have been attacked over the last few decades and are essentially the reason for the drastic increase in income inequality.
In short, I see capitalism as an ideology to be frighteningly dangerous... it is essentially 'survival of the fittest' - which if that's what you want then you don't need society at all. Capitalism as model for a monetary is something that isn't perfect but as you said is the best we've got. The problem is that a lot of people don't differentiate between the two and so just think capitalism=bad.
Capitalist Economy - drives the creation of better products as companies compete with each other for market share. We get nice new phones, tablets etc.
Capitalist Ideology (i.e. screw regulation, let the free market decide) - allows for things like planned obsolescence, pseudo monopolies and incredibly risky speculation by banks (safe in the knowledge that governments will protect them ahead of their citizens because 'the economy'). None of these things are good for the consumer, nor do they drive innovation - in fact, it's pretty much the opposite.