Common case of author just heaping OP powers onto an MC and not actually knowing how to write an OP MC.
Making them dumb doesn't balance powers, and powers shouldn't be balanced, not like that. Also, taking their powers away/crippling them every time a real enemy's around is stupid.
It's like how in Inuyasha, the monk with the black hole hand, whenever fighting a real threat would be useless, because of 'random poison insects' who flood the area suddenly and if he absorbs them he'll get poisoned and die. Black hole = useless, forever. Stupid.