False dichotomy. The Fed can have good intentions, and a good-but-not-perfect idea what they're doing, and things can be working out, not perfectly, but better than they would in the absence of the Fed.
Is there any evidence for that? Yeah, look at the world before the Fed. Look at the "Panic/Depression of 18xx". There's several to choose from. They're 2008-or-worse events, over and over and over.
The economy is a really complicated system, with lots of humans (and their emotions!) as part of the system. It's really hard to tune it perfectly. That doesn't mean that the Fed is either malicious or incompetent.