Yeah I’m not sure what the premise here is. Might as well call it an OC. I mean, I get it. I love isekai myself, but that’s a cheap way to bring readers.

yeah an Oc or a an au version of a canon character would have been better...I think that in most (if not all) fanfic a transmigrated mc who dies not know the world he is in must be used only if the author plan for multiverse kind of fanfic

It is that there must be something special in this type of case, where the person has something from his previous world, the protagonist of soul land had the abilities of his sect... In another novel the protagonist has a chip and he transmigrated with it. , etc. Here, well, apart from the fact that he has memories of a life that doesn't really help much, I don't know what's special...

Like maybe if the character, who doesn’t know dragon ball, has visions of the future fights, only fights so he doesn’t know about him marrying chi chi etc, to give him motivation and some moves to copy. And you can do it in a lore friendly way, if you make it so that bardok is the one from the episode of bardok, then you can have Bardok remember how the kanassan hit him to enable him to see the future and then have him hit baby (then kakkarot) goku to give him the sight before sending him to earth.

maybe it would be better if the mc had some special talent, it seems he wasn't a good student either.

not to mention, he got no desire, and he isn't even interested in the world he is in, i mean for many years he stayed in the same house, not exploring, he didn't have a clue about the canon, so him waiting for Bulma to arrive was stupid,