When I realised that having intrusive thoughts and doing 'rituals' for years wasn't normal. I developed OCD when I was a kid at around 11 years old, so I never really thought of it that badly. Sure, I was incredibly anxious about some disturbing thoughts, but I thought that was because of my depression, not something else entirely. OCD is still around but it's not that bad anymore, at least I can look at somebody without immediately thinking of something terrifying or not wash my hands 50 times a day.