Why do people hate Sigmund Freud

I’m a student who is pursuing a literature degree and one of my professors talked about how if someone actually read the works of sigmund freud they would end up hating him. I have only read couple of his seminal works like creative daydreaming and Id, Ego, Super Ego and found him alright. For some reason the people who hate him won’t explain why, other than the incestous connotations in his works.