For me one of the most fascinating parts of the bible is when God repents of making humanity in the story of Noah (Genesis 6:6). Fast forward to Jesus and you've got Jesus being the Passover lamb. The Passover lamb is the object that takes the blame. Put the two together and you've got a God who is sorry and takes the blame for sin.
If we were to ask Is God responsible for the mess we find ourselves in? Before we can even ask the question or try make a judgement about what proportion (if any) we want to blame god. God has already said sorry for the mess and taken the blame. That's powerful. Particularly in an age when no one wants to admit they are sorry or take any portion of blame for fear of the consequences. Rather they would wait for a court or other higher power to prove their guilt.