A person with that name may have existed, but there is no mention of the many fictions in the new testament except in the new testament, written decades after this fictional character allegedly lived. If he was so special why did people wait so long to write it down? Or perhaps it just took that long for the legend to grow amongst these primitive people?
You couldn't be more wrong in your assumptions. May have? Jesus is the most documented person in antiquity with 45 sources within 150 years of His death, 17 of which are from non-Christian sources. No historian takes your approach, you're on your own. Mindless belligerency is your approach. When historians look for documenting history for Jesus all the criteria are met holding to the highest of standards.
Why assume people waited a long time to write it down? Take for example Luke who wrote Acts. He never made any mention of Paul's death. Paul died 65 AD in the Neronian persecutions. But Luke said Acts was part two of his former work of Luke. So that places Acts around 50 AD and Luke around 40 AD. But Luke took in part from Mark so that places Mark around 35 AD just 2 years after the cross. Is that too late for you? Peter was friend with Mark so that places Peter's two epistles right after the cross also.
There is no person in antiquity that has sources closer than does Jesus. Plato, Aristotle and Julius Caesar earliest sources are dated over a 1000 years after they died. For Jesus it is just a couple years.
Since the gospel goes all the way back to the cross, and Paul even said he spent 15 days with Peter, and time with James and John, they confirmed their eyewitness testimony to one another.