The heroes seems to be dicks, and the people changing their so called brain around. No only that despite not defending their child when another person's child is about to beat the main character their child forcing him use that which was taught or self learned through observation. The main character never learned anything from his father so yeah why feel bad, they all literally shat on the mc.
To sum up what I wrote the parents are dicks, the people are mental, and not a lot of them even understood the main character despite being their "CHILD" except some like that girl over there who said "stop". In a way the mc is also in the wrong for running away but that is understandable it is hard.
I think greatly of this manga.