Does God Exist? Part 1

Yes, I know, this is a very controversial issue and it's hard to write about it but I still want to do this because it's been around my mind yesterday (and many days before since i was like 10). I hope nobody is offended by what I write, and I don't expect this to be a Theology text or anything, it's just my thoughts about the great question, so there won't be irrefutable or great arguments, just things everyone can figure out. First, some relevant facts about me:
I live in a country typically christian catholic, I took some religion classes in primary school but my parents are atheists, and so am I. When I was 8 or so I decided to be christian because all other kids in my class were doing so, also because my grandma made me pray at nights and well, the media helped too. However, I became an atheist later.

I never really thought about the whole thing until I noticed how the world really is. "What a cruel God we have if it really exists"; that was my first atheist argument so I'll talk about it first.
If there is a God who can do anything, achieve anything, and is everywhere...why are we so fucked up? I mean, poverty, starving people, brutal wars, all of that exist. Furthermore, the concept of hell confuses me. God is said to love us humans, to want the best for us, but if you make mistakes in your "mortal life" which is like, let's say, 70 years long, you pay for it with an enternity of pain and suffering...I really don't get it. Also he has this senseless decision of giving us freedom to think and do what we want, only to then punish us for actually thinking and doing whatever we want.

Another argument is the idea of how religion's interests matches society's interests, and ultimately society leaders' interests and this has been like that for ages. Think of religious rules everybody knows like "You shall not steal" or "You shall not kill", or commit suicide, or you will have sex only for children. This applies to what a society needs from its members to survive and develop. Certainly we are going nowhere if everyone is a thief and nobody produces anything, or if we go around killing each other or if we spend the day in bed with our couple. Given this, you can think Religion is just another social control instrument someone made up long ago, and still exist nowadays "adapted" to our times. It's really sad to think about people being "good" only because they will go to hell if they aren't, but I guess this is true for millions of people, and to be honest it creeps me out thinking of how would they act like if religion didn't exist...

Well this is Part 1 of the entry, I'm splitting it so I don't miss anything and also I just realized I may use your comments for Part 2 so feel free to ask, discuss, criticize, whatever.