I should say it soon won't be a problem for long as this person is a replacement for me and I am going onto bigger and better things. I have worked for the company for over a decade, and increased profitability and customers greatly in that time, basically built the business up from scratch. My replacement has very little previous relevant experience but I found out that she is being paid a much higher hourly rate. I am expected to teach her the ropes and provide her with all the information necessary to run the business after I've gone. AIBU to suggest that someone they obviously value more than me already, can do perfectly well without my help? 
I realise this has more to do with my arsehole boss than the new employee.....