Is Christianity based on older myths?

[Tonus]

There were no mentions of Jesus in any contemporary works during the time Jesus was supposedly alive and kicking. I'd expect someone so magical and supernatural to have at least warranted one contemporary reference to him whilst he was around.

And it remains a curious detail that none of these sources who apparently identified this person as god incarnate seemed at all interested in doing anything more than passing along a tidbit they'd heard, before getting back to the more pressing issues of whatever mundane horseshit was going on around them. Were the people providing this info so lacking in enthusiasm or sincerity that the writers simply humored them? Or was this the golden age of god-as-men walking the earth and turning water to wine and virgins into mothers, and the writers were simply tired of dedicating column inches to the savior-of-the-month (full spread with photos on page 11!)?

It's as if god couldn't impress anyone. Adam and Eve disobeyed him the moment he turned his back, his own angels seem to have abandoned him in droves, and even today only 2/7ths of the planet are convinced, and they're not even sure about one another! Look, it's been 6,000 years. Time to fire that shitty PR firm and find someone who knows what the fuck he's doing.