Again, he wasn't perfect by any stretch, but his work and push of psychoanalysis is the seed to our current forms of therapy. Yes, modern therapy still isnt perfect for war and trauma induced PTSD but holy shit it's better than cranking up the voltmeter on someone, pumping them full of cocaine and tobacco and snakeoil, or just locking them up in a padded room. This doesn't include some of the archaic religious torture practices some places of the world still utilize to this day.
The dude was on the right track compared to the rest of his time. Give credit where credit is due. It's not like you invented the transistor. We all stand on someone else's shoulders. Hindsight is a whole hell of a lot easier than foresight.
Again, we dont think Dalton set us back in atomic theory since he was the pioneer. Why the hate for any other pioneer then?