Strawman. I can make an argument for capitalism that doesn't require attacking anything else.

Your whole argument was that any system that criticizes Capitalism is inherently bad.

One thing being bad does not prove that an alternative is better.

That is true, however, an alternative could be better, thus should be sought. Perhaps there will never be a proper alternative, but we can't know that for certain until everything has been tried.

You can compare two things and say "look at how 1 tackles poverty better than 2". But that is not the same as saying "1 is bad at tackling poverty therefore 2 is better".

What I'm saying is that "1 tackles poverty better than 2, but 3 could be better than both."

And "theories" are not things you can validly compare to reality.

If everyone refused try Capitalism — or stopped once it failed — then we would never have Capitalism, thus would be stuck in a system of Feudalism.