the key point is that he cannot display any strength stronger than the hero's. this was mentioned in an earlier chapter.
currently the "hero" is someone who is capable of fighting one on one with a lv 4 and possibly defeating them. that's why the strength he has (which can easily annihilate a lv 4) is "too much" strength for him to display.
basically all the characters are too weak ass including the heroes and he can't flex his power much
Mc wants to keep a low profile, ie; doesn’t want to show off unless it’s Absolutely necessary.he wants to be a background character/ an extra. No point in showing off his powers.
I guess he could but still, being at risk of HEART EXPLOSION would also make me deem myself weak at all times. He only gets one chance, so I doubt he's eager to show off. Plus, it's what he wanted so I doubt he's mad. The heart explosion is just a condition to make sure he never exposes himself.
Okay, I could’ve sworn that his heart only explodes once his true strength as “being stronger than any dragon or demon king” is revealed. But why can’t he just use a bit of his strength to at least be as powerful as the average magic using noble kid or something? Why fail miserably at everything on purpose but do that annoying fucking cackling smile each time because people don’t know his true strength? Why put up with the director abusing everyone the whole time but secretly cackling the entire time while your siblings don’t know you could’ve ended him lmao? No one cares if you’re secretly strong but do Jack shit to help anyone; it’s just a waste!
Still at the beginning chapters but MC is high key good potential that’s wasted on the whole “can’t do ANYTHING of importance despite being strong” narrative, because even the hidden strength characters he drools over still use their powers to do SOMETHING. Also, why not use the meat from the monsters he hunted to feed his siblings in the orphanage? He could’ve said he found them dead or something lmao