I'm not that good at trading yet but I think finding a multi millionaire mentor may be limiting and hard to find. In my experience, mentor's and mentee have mutually beneficial relationship. So unless you're bringing something to the table for the mentor, it may be hard to get one willing to mentor you. Having said that, when I look around the world, I often see mentor (coaches, teachers, tutors, etc...) help the people they train achieve excellence without they themselves ever achieving that level in their life. Being successful, doesn't equate being able to pass on that knowledge. There is an art in teaching others. (I've been a high school teacher for 8 years now).
From the sound of things, since you once traded full time, I too think that your issue isn't in your skill, but your psychology/emotions. You probably just need someone to make you aware of your blind spot.