The life and trials of a growing Christian-Day Twenty Three

I've just about finished reading the third of the five books of the Pentateuch, which is the first five books of the bible, or the law, or Moses. I have had a very hard time reading this book (Leviticus) so it has taken me a very long time (too long). I'm not feeling led to talk about Leviticus but I am feeling led to talk a little bit about rebellion and bickering, which leads me to Exodus. We all know about Exodus; Moses was told by God to bring the Israelites out of Egypt. He made up a few excuses which God refuted and counteracted and then he went. When he got there he asked Pharaoh to let the Israelites go. Ten times he asked, and nine times Pharaoh said no, and even on the tenth time, after Egypt was brought just about to total destruction (from the miraculous plagues that God brought upon them) and every first born of Egypt was killed by the angel of death, Pharaoh changed his mind and led the Egyptian army to it's final destruction in the red sea where God parted the waters and allowed the Israelites to cross to safety, on dry land, while drowning the Egyptian army. So, the Israelites were now freed slaves and they had God with them (in the pillar of smoke during the day and the pillar of fire at night). The Israelites saw God do many miracles both in Egypt and in the desert, they never went hungry, and their cloths and shoes never wore out. So, what did they do to show God how much they trusted, loved and appreciated Him? They bickered, fought, argued, and worst of all doubted the Lord their God. Time after time they asked "Why did God bring us out here in the wilderness to die?"
I have read this many times and many times I have asked myself "Were they dense or something?" They had God all mighty with them, we do to but they could physically see His presence and they doubted His ability to care for them. DUH! But then I think a little deeper and say the same thing about myself. DUH! I have the saving grace of Jesus! I can pray directly to God without any priest in the way. I don't have to sacrifice any animals to God. I am free to do all things through Jesus! Yet, I doubt sometimes. I bicker and argue with my fellow Christians sometimes. I pray and beg and plea for God's help and intervention and don't receive it sometimes because sometimes I don't think He's going to give it. If I have doubt, I'm already defeated.
I know that I'm not the only person on the face of the earth that is struggling with this, in fact, to be honest, I think that just about everybody is, but I am the only person that I can speak for. Please God remove any trace of doubt from me, in Jesus name, AMEN.