Too often, people who leave behind toxic belief systems might leave behind the beliefs but not the system. A toxic religious or political ideology teaches you to think something dogmatically; when you stop believing, you think you're free, but then you commit yourself to believing something else dogmatically. You see this a lot with ex-Christian atheists: because they don't believe in God anymore, they insist that anyone who does is illogical, stupid, etc. They've changed what they believe but not how they believe it.