Superior harassment

Continuously Getting mails seeking explanations for mistakes which can be sorted out with me verbally as i'm his subordinate. I feel he should take the initiative to escalate to the superiors in the best way possible. My concern is that he can save me in crisis situation instead he puts me in a spot of bother, I fear my growth will be affected because of the method he is following My superior handling level through emails, which will reduce my enthusiastic attitude, losing my confidence level and creating panic about career growth. Definitely Those type of mannerism and insecure feeling & activities will be wipe up through my reply emails. Which enhances my hopes of my company and my growth. He always trying to attract management considerate and his behavioral demonstrate as a workaholic person. But actual is reciprocal. We never get any type of appreciation from our superior for the last 2 years(Even through smile when we resolved hectic problems and issues in our department). He never teach to us new or unknown areas. Because of all the above i feel mental pressure, which will affect my performance. Please advice