Question: dbz why is gohan so weak?
Answer: I agree that Gohan(Mystic) has definitely become weaker after Buu saga. This is a consequence of Gohan neglecting his training and pursuing on becoming a professor. But I'm hopeful, SSJ Gohan was still stronger than Picollo in Resurrection of Frieza saga. Frieza humiliated Gohan and, as usual, Goku had to save the day.