I don't know what r u saying but after watching anime for the past 23 years more or less DBZ remain my favorite anime of all time & Goku my favorite anime char, have u ever consider what it means to be a Sayan in the first place? I have watch DBZ more than 10 times already probably more & before you spout nonsense about Goku think for a moment the question I ask u.
Sayans as a race love fighting, it's in their genes it's the reason they live to fight every strong opponent they can find & increase their power as much as possible, for a Sayan power have no limits, a small example is that every time a Sayan comes close to die & overcome death gain a gr8 boost in power, other example is that Sayans compare to Earthlings live longer & stay younger in order to fight for as long as possible.
So before u judge Goku because he do what hes genes & his guts told him to do to keep on fighting & become stronger with few words because guess what he is a Sayan & that's what he is supposed to do, take his place & think like u were him & about the ppl who left to die who the fck cares it's not something they cant fix anyway, in the end they always bring every1 back to life or did u loose that part?