The right word is mentor. No other word fits your description and discourse.
Sadly, there are few mentors and even fewer of them willing to mentor others in their field.
Another angle is that the mentees are not willing to listen, be patient and endure due process. They all want "it" now.
Most mentors that we admire today failed severally and rose up again. They spent years toiling and suffering before they became big but mentees don't want to toil, they want to big at twenty, mtchewww