The content of his studies was mostly false, but the concept of it was influential and groundbreaking. He initiated the process of moving the questions of the mind from the field of philosophy to the field of science and medicine... But he didn't achieve that process himself. His psychoanalysis wasn't science yet, but philosophy on its way to become science.

I mean, he can be the most important founding father of modern psychology and also have been wrong about everything he said. Let's be real. Modern psychology is still very, very wrong about a lot of things. It's a science in its infancy. Alchemists were wrong about everything, but their work made chemistry possible. Standing on the shoulders of giants doesn't always mean those giants were right.

Freud is seriously the biggest hack in any field I can think of that went on to get such undeserved renowned.