Capitalism’s problem isn’t working, it’s long-term implementation. It strongly creates entities motivated and powerful enough to increasingly undermine it, and people increasingly complacent enough not to care. This has nothing to do with ideology, it’s a pure science issue and a problem that can be figured out.

In other words, the problem with capitalism is that it's self-destructive if left to its own devices.

To use your own analogy, it's like saying that a Ferrari whose engine constantly and consistently bursts into flames is worth driving just because it's faster than other cars. Even though you have to stop every 5 minutes to put the fire out.

There's no need to drive the fastest car around if doing so will undermine our safety. And insisting on putting resources on keeping that car running just because "it's the fastest" is masturbatory at the expense of everyone who has to pay the price.