Review Detail of xerxes33311 in Harry Potter and the Prince of Slytherin

I followed this story since the beginning and quite enjoyed the plot and steady development of mc to opness. All of a sudden the author just slapped in a uber op transmigrated nemesis for our protagonist and that just felt very sour, cause before that point the mc was the only other worldly being and here comes this new character who also transmigrated in to HP is is op af. So yeah f... this story and the randomness of the plot.