Being completely honest I like the writing a lot, I like where the story is going and it's pretty cool that it's not the typical I'm a saiyan and therefore I'm instantly the strongest, but I think the author applied a nerf as I find it unlikely that someone who has been trapped all his life in a coliseum wouldn't know any fighting techniques especially coming from a saiyan in which even their lower class warriors are noted to be extremely prodigious in martial arts (e.g. goku that we go over was a lower class warrior and could instantly learn the kamekameha) but that would be all: goku we remember was a low class warrior and could almost instantly learn the kamekameha) but that would be all for the rest good story.