Does Calvinism make the most sense as far as Christianity Goes?

[Wyrd of Gawd]

Honestly, I'm not that up on Calvinism, but as I understand it one of the core tenets is that salvation and damnation are predetermined. Since God is supposed to be all-knowing and all-powerful, then doesn't that mean that he creates humans exactly as he sees fit, and since he's all-knowing, wouldn't that also mean that he would know exactly how every human would act? If he is both all-knowing and all-powerful, then wouldn't it be impossible for any human to have the freewill to change his fate?

I gave it some deep thought and here the premise of it. If you are already destined to be sent to hell there is literally no point in living your life 
if you are already destined to go to Hell because it would be pointless to live a life even if you do follow jesus and or god and still get sent to hell. 
So pretty much your cutting the middle man god and doing it yourself going on the one way trip down. Of course the bible says god will be pissed
he wouldn't have a reason too because in the end you are going to hell anyways.

Well, if you're lucky you can go to the sea or to death when you die instead of going to hell.  But they are all temporary and everyone makes bail on Judgment Day.  Heck, even if you were in hell you could still end up in the gaudy bejeweled golden cube called New Jerusalem behind the high wall but only if you're a member of one of the twelve tribes of Israel.  The name is a big clue that it's a gated community.  In fact it has twelve gates, one for each tribe.  There's no gate for Gentiles so they won't be getting in.  I suppose it's off to the lake of fire for the riffraff. Jesus is big on burning people up.  Their sizzling flesh provides a pleasing aroma.  He really likes that.  Gotta keep him happy for some strange reason.