Why people have faith on god!!

I believe there is no god or super power but my all friends n family member believe on this UPO(undefined pathetic object). I seriously want to meet some one who can spell God in sensible manner ......Ppl use to say god made us he made the earth universe and all tinny to giant things are manufactured in his factory. This irritates me a lot the reason is when i failed in some operation or I was low performer in accomplishing any task everybody pointed me for that and for every success credit goes to UPO, this seriously pissed me off. Its ok if i dont believe UPO then according to ppl I m going to face hell after my this life ......here my doubt is if its truth then who is he to decide my destination as hell or heaven n if he exist and decides like this then i cant find any difference in between muaharraf n UPO. I am a hindu......so in that religion ppl use to worship lord RAM and lord Krishna........but justify me how can I pray a person who even never trusted his own wife and fought with his own children for a small piece of land.....n lord krishna having a huge no of wives or whatever name ppl have a single person related with this many women....i dont think its allowed in any civilized society.....n many more examples........so I still wonder if pl are runnig after the old settled tradition instead of using their own intellect ...... hey guys go after the meaning hidden behind word god ....n when same i did i found "One who takes decision is god and one who let other take decision about him is normal human being" rest is others wish......