Unfortunately life doesn't work like that! If you love doing something yet are constantly hounded and abused by the people watching it then it's hard to keep at it! If you've never been a rider or involved with them then you wouldn't understand the stress and pressure they feel.
On track with 3 other riders going 60mph with no brakes needs full concentration and commitment!
Best thing to do is step away and live life for yourself and get back to the person you were before everyone thought they had a right to abuse you. He can still sit on a bike and do laps that he'll enjoy with no one there to criticise him!