Why we are angry with God?

We’ve long known that people can get angry at God but a 2013 study in Psychology of Religion andSpirituality (Grubbs, Exline, & Campbell, 2013) tells us who is most likely to do so. The authors found that anger at God was predicted by psychologicalentitlement—the belief that one deserves more than others. The authors argue that those feelings of deservingness lead to more intense perceptions of having been wronged when individuals don’t get what they want.

Controlling Mind Games

Normal people doing their best and making normal mistakes.
It's said that modern education and learning techniques discourage and punish mistakes,  so we instinctively avid things that we might get wrong... 

Ever had that person in your life that is always on your back or criticising you? No matter how much you do right,  they'll make a big deal about that one tiny mistake.

Is there a chance they don't want us to get it right? They aren't over critical,  they are looking for your flaws and failures,  they could be deliberately setting you up for failure...  We all want to be praised and accepted so often we work harder to please the person who cannot be pleased. Maybe we should ask ourselves what these people's motives are...  And if it's not about the spirit of or the ethic of,  then chances are its not the mistakes that are the problem...  To them, you are the problem!

They are the one with the problem,  not you. Its their problem, not yours and don't let it be, don't let yourself play their games...  Stop trying to get it right for them,  because in their eyes you probably never will.