God will give you everything you need once you are ready to receive

That is true. To blame God, be angry at Him or ungrateful is not really fair because we can close our channel many times with our ego, our anger against his sons (that are our brothers). So often we think we are alone and then when something is bad we do blame Him because we can't face the failure is our own and if we be optimistic we'd see it's just a lesson.

God is definitely the only one in this world that knows what to give you and when to do it. To prepare myself to receive what God has got in stored for me, I must first of all accept his love even if the going gets tough all the time. Learn to give to others without expecting something in return, follow his commandments and live a spiritual life without thinking of what the others is going to say. Stop judging others who are in need and also learn to do sacrifices more often.