Review Detail of Ayer52 in New Hero in DxD

The background of the MC and his actions are completely contradictory. Apparently he spent 6,000 years being trained by heroes yet, he still acts like a toddler. Constantly making biased and rash decisions without properly thinking things through, almost every action he takes is the worst and causes problems for everyone. Some might enjoy this story but the foolishness of the MC and the amount of drama is a complete turn-off for me as a reader.