This is fairly generic but its well drawn and seems wholesome enough so far.
"The story goes too fast and is just bad",
The plot moves rapidly but its coherent. "Its just bad" is a nonsense critique.
"overrated MC is getting OP too fast."
Over-rated is a weird complaint. Over-rated by whom? And if he's "getting OP" then how would he be over-rated? He's one or the other. You also seemed to miss the fact that all royalty in this setting are OP. His siblings are lords of magic and sword gods, hes just getting up to their level.
" It's just full of coincidences bullshit with no real objective,"
I don't want to shock you but every fictional story is full of contrived coincidence. As for no real objective, his objective is so transparent and explicit that its generally surprising anyone could miss it. The objective is to survive on the barren reef he was exiled to.
"it's just a story that has nothing to offer except for OP MC that will use his powers only to help newly introduced characters, that will lost meaning in later chapters, because there's no plot at all and they are just a fillers."
It's four chapters in, nothing you've predicted has happened yet (because, again, its four chapters in). The characters we've seen so far seem integral to the setup. But unless you have amazing psychic powers you shouldn't present your unfounded predictions as fact (and if you do you should probably use them for something useful).
As always the comments are full of people who confuse their subjective preference for an actual critique. The above is just one example, my personal favourite is "If only this was as amazing as Tensura but he MC got OP too fast", a series where the MC absorbed the powers of one of the most powerful beings in the setting in the first fucking chapter. Do you people even read what you write? Oh and cheers for the unspoilermarked spoilers.